US2023322846A9PendingUtilityA9

Neuroactive steroids and their methods of use

Assignee: SAGE THERAPEUTICS INCPriority: Dec 5, 2018Filed: Dec 5, 2019Published: Oct 12, 2023
Est. expiryDec 5, 2038(~12.4 yrs left)· nominal 20-yr term from priority
A61P 25/08A61P 25/24C07J 43/003C07J 41/0044C07J 41/0094C07J 41/005C07J 41/0055A61K 31/58A61P 25/00
70
PatentIndex Score
0
Cited by
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Claims

Abstract

Provided herein is a compound of Formula (I) or a pharmaceutically acceptable salt thereof, wherein R 19 , R 5 , R 3a , R 1a , R 1b , R 2a , R 2b , R 4a , R 4b , R 6a , R 6b , R 7a , R 7b , R 11a , R 11b , R 12a , R 12b , R 18 , R D , and q are defined herein. L is selected from the group consisting of: wherein A indicates the point of attachment at C17 and wherein X is selected from the group consisting of —C(0)N(R 55a )(R 55b ), —N(R 55a )(R 55b ), —N(R 55b )C(O)(R 55a ), and R 55C wherein R 55c is carbon-bound substituted or unsubstituted heteroaryl or substituted or unsubstituted aryl. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I) and methods of using the compounds, e.g., in the treatment of CNS-related disorders.

Claims

exact text as granted — not AI-modified
What is claimed: 
     
         1 . A compound of Formula I: 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof; 
         wherein:
    represents a single or double bond, provided if a double bond is present, then one of R 6a  or R 6b  is absent and R 5  is absent; 
 L is selected from the group consisting of: 
 
       
       
         
           
           
               
               
           
         
          wherein A indicates the point of attachment at C17;
 X is selected from the group consisting of —C(O)N(R 55a )(R 55b ), —N(R 55a )(R 55b ), —N(R 55b )C(O)(R 55a ), and R 55c ; 
 R Y  is each independently hydrogen, cyano, haloalkyl, or unsubstituted alkyl; 
 R 55c  is carbon-bound substituted or unsubstituted heteroaryl or substituted or unsubstituted aryl; 
 R 55a  and R 55b  is each independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —OR A1 , —N(R A1 ) 2 —SR A1 , —C(═O)R A1 , —C(═O)OR A1 , —C(═O)SR A1 , —C(═O)N(R A1 ) 2 , —OC(═O)R A1 , —OC(═O)OR A1 , —OC(═O)N(R A1 ) 2 , —OC(═O)SR A1 , —OS(═O) 2 R A1 , —OS(═O) 2 OR A1 , —OS(═O) 2 N(R A1 ) 2 , —N(R A1 )C(═O)R A1 , —N(R A1 )C(═NR A1 )R A1 , —N(R A1 )C(═O)OR A1 , —N(R A1 )C(═O)N(R A1 ) 2 , —N(R A1 )C(═NR A1 ) N(R A1 ) 2 , —N(R A1 )S(═O) 2 R A1 , —N(R A1 )S(═O) 2 OR A1 , —N(R A1 )S(═O) 2 N(R A1 ) 2 , —SC(═O)R A1 , —SC(═O)OR A1 , —SC(═O)SR A1 , —SC(═O)N(R A1 ) 2 , —S(═O) 2 R A1 , —S(═O) 2 OR A1 , or —S(═O) 2 N(R A1 ) 2 , wherein each instance of R A1  is independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, or substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, a sulfur protecting group when attached to sulfur, or two R A1  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring; 
 or R 55a  and R 55b  may join together with the intervening atoms to form a substituted or unsubstituted heterocyclyl or a substituted or unsubstituted heteroaryl; 
 each of R 1a , R 1b , R 2a , R 2b , R 4a , R 4b , R 7a , R 7b , R 11a , R 11b , R 12a , and R 12b  is independently hydrogen, halogen, cyano, —NO 2 , substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —OR A1 , —N(R A1 ) 2 , —SR A1 , —C(═O)R A1 , —C(═O)OR A1 , —C(═O)SR A1 , —C(═O)N(R A1 ) 2 , —OC(═O)R A1 , —OC(═O)OR A1 , —OC(═O)N(R A1 ) 2 , —OC(═O)SR A1 , —OS(═O) 2 R A1 , —OS(═O) 2 OR A1 , —OS(═O) 2 N(R A1 ) 2 , —N(R A1 )C(═O)R A1 , —N(R A1 )C(═NR A1 )R A1 , —N(R A1 )C(═O)OR A1 , —N(R A1 )C(═O)N(R A1 ) 2 , —N(R A1 )C(═NR A1 ) N(R A1 ) 2 , —N(R A1 )S(═O) 2 R A1 , —N(R A1 )S(═O) 2 OR A1 , —N(R A1 )S(═O) 2 N(R A1 ) 2 , —SC(═O)R A1 , —SC(═O)OR A1 , —SC(═O)SR A1 , —SC(═O)N(R A1 ) 2 , —S(═O) 2 R A1 , —S(═O) 2 OR A1 , or —S(═O) 2 N(R A1 ) 2 , wherein each instance of R A1  is independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, or substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or a sulfur protecting group when attached to sulfur; or R 11a  and R 11b  are joined to form an oxo (═O) group; or R 12a  and R 12b  are joined to form an oxo (═O) group; or R 4a  and R 4b  are joined to form an oxo (═O) group; or R 7a  and R 7b  are joined to form an oxo (═O) group; or R 2a  and R 2b  are joined to form an oxo (═O) group; or R 1a  and R 1b  are joined to form an oxo (═O) group; 
 R 3a  is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl; 
 R 5  is hydrogen or substituted or unsubstituted alkyl; 
 each of R 6a  and R 6b  is independently hydrogen, halogen, cyano, —NO 2 , —OH, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl; or R 6a  and R 6b  are joined to form an oxo (═O) group; 
 R D  is independently hydrogen, halogen, —CN, —NO 2 , oxo, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —OR C3 , —N(R C3 ) 2 , —SR C3 , —C(═O)R C3 , —C(═O)OR C3 , —C(═O)SR C3 , —C(═O)N(R C3 ) 2 , —OC(═O)R C3 , —OC(═O)OR C3 , —OC(═O)N(R C3 ) 2 , —OC(═O)SR C3 , —OS(═O) 2 R C3 , —OS(═O) 2 OR C3 , —OS(═O) 2 N(R C3 ) 2 , —N(R C3 )C(═O)R C3 , —N(R C3 )C(═NR C3 )R C3 , —N(R C3 )C(═O)OR C3 , —N(R C3 )C(═O)N(R C3 ) 2 , —N(R C3 )C(═NR C3 ) N(R C3 ) 2 , —N(R C3 )S(═O) 2 R C3 , —N(R C3 )S(═O) 2 OR C3 , —N(R C3 )S(═O) 2 N(R C3 ) 2 , —SC(═O)R C3 , —SC(═O)OR C3 , —SC(═O)SR C3 , —SC(═O)N(R C3 ) 2 , —S(═O) 2 R C3 , —S(═O) 2 OR C3 , or —S(═O) 2 N(R C3 ) 2 , wherein each instance of R C3  is independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted carbocyclyl, or substituted or unsubstituted heterocyclyl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or a sulfur protecting group when attached to sulfur; 
 R 18  is substituted or unsubstituted alkyl; 
 R 19  is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl; and 
 q is an integer from 0 to 5; 
 provided that the compound is not: 
 
       
       
         
           
           
               
               
           
         
          or a pharmaceutically acceptable salt thereof. 
       
     
     
         2 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-I): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein
 each of R 15a , R 15b , R 16a , and R 16b  is independently hydrogen, halogen, —CN, —NO 2 , substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —OR C3 , —N(R C3 ) 2 , —SR C3 , —C(═O)R C3 , —C(═O)OR C3 , —C(═O)SR C3 , —C(═O)N(R C3 ) 2 , —OC(═O)R C3 , —OC(═O)OR C3 , —OC(═O)N(R C3 ) 2 , —OC(═O)SR C3 , —OS(═O) 2 R C3 , —OS(═O) 2 OR C3 , —OS(═O) 2 N(R C3 ) 2 , —N(R C3 )C(═O)R C3 , —N(R C3 )C(═NR C3 )R C3 , —N(R C3 )C(═O)OR C3 , —N(R C3 )C(═O)N(R C3 ) 2 , —N(R C3 )C(═NR C3 ) N(R C3 ) 2 , —N(R C3 )S(═O) 2 R C3 , —N(R C3 )S(═O) 2 OR C3 , —N(R C3 )S(═O) 2 N(R C3 ) 2 , —SC(═O)R C3 , —SC(═O)OR C3 , —SC(═O)SR C3 , —SC(═O)N(R C3 ) 2 , —S(═O) 2 R C3 , —S(═O) 2 OR C3 , or —S(═O) 2 N(R C3 ) 2 , wherein each instance of R C3  is independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted carbocyclyl, or substituted or unsubstituted heterocyclyl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, a sulfur protecting group when attached to sulfur; or R 15a  and R 15b  are joined to form an oxo (═O) group; or R 16a  and R 16b  are joined to form an oxo (═O) group. 
 
       
     
     
         3 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-a): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein the variables are as defined in  claim 1 . 
       
     
     
         4 . The compound of any one of  claims 1 - 3 , wherein the compound is a compound of Formula (I-Ia): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein the variables are as defined in  claim 1  or  2 . 
       
     
     
         5 . The compound of any one of  claims 1 - 4 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         6 . The compound of any one of  claims 1 - 5 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         7 . The compound of any one of  claims 1 - 5 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         8 . The compound of any one of  claims 1 - 5 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         9 . The compound of any one of  claims 1 - 4 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         10 . The compound of any one of  claims 1 - 4 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         11 . The compound of any one of  claims 1 - 4 , wherein L is 
       
         
           
           
               
               
           
         
       
     
     
         12 . The compound of any one of  claims 1 - 11 , wherein X is —N(R 55b )C(O)(R 55a ). 
     
     
         13 . The compound of any one of  claims 1 - 11 , wherein X is —N(R 55a )(R 55b ). 
     
     
         14 . The compound of any one of  claims 1 - 11 , wherein X is —C(O)N(R 55a )(R 55b ). 
     
     
         15 . The compound of any one of  claims 1 - 14 , wherein R 55a  is hydrogen or methyl and R 55b  is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl. 
     
     
         16 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is each independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl. 
     
     
         17 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is each independently hydrogen, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl. 
     
     
         18 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is each independently substituted carbocyclyl, substituted heterocyclyl, substituted aryl, or substituted heteroaryl. 
     
     
         19 . The compound of any one of  claims 1 - 14 , wherein at least R 55a  or R 55b  is other than hydrogen. 
     
     
         20 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is each independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, halogen, —NO 2 , —CN, —OR D4 , —N(R D4 ) 2 , —C(═O)R D4 , —C(═O)OR D4 , —C(═O)N(R D4 ) 2 , —OC(═O)R D4 , —OC(═O)OR D4 , —N(R D4 )C(═O)R D4 , —OC(═O)N(R D4 ) 2 , —N(R D4 )C(═O)OR D4 , S(═O) 2 R D4 , —S(═O) 2 OR D4 , —OS(═O) 2 R D4 , —S(═O) 2 N(R D4 ) 2 , or —N(R D4 )S(═O) 2 R D4 , substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl; 
 each instance of R D4  is independently hydrogen, substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or two R D4  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring; and 
 p is an integer selected from 0 to 11. 
 
       
     
     
         21 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is each independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, 
       
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, halogen, —NO 2 , —CN, —OR D4 , —N(R D4 ) 2 , —C(═O)R D4 , —C(═O)OR D4 , —C(═O)N(R D4 ) 2 , —OC(═O)R D4 , —OC(═O)OR D4 , —N(R D4 )C(═O)R D4 , —OC(═O)N(R D4 ) 2 , —N(R D4 )C(═O)OR D4 , —S(═O) 2 R D4 , —S(═O) 2 OR D4 , —OS(═O) 2 R D4 , —S(═O) 2 N(R D4 ) 2 , or —N(R D4 )S(═O) 2 R D4 , substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl; 
 each instance of R D4  is independently hydrogen, substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or two R D4  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring; and 
 p is an integer selected from 0 to 3. 
 
       
     
     
         22 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is each independently hydrogen, substituted or unsubstituted alkyl, 
       
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, halogen, —NO 2 , —CN, —OR D4 , —N(R D4 ) 2 , —C(═O)R D4 , —C(═O)OR D4 , —C(═O)N(R D4 ) 2 , —OC(═O)R D4 , —OC(═O)OR D4 , —N(R D4 )C(═O)R D4 , —OC(═O)N(R D4 ) 2 , —N(R D4 )C(═O)OR D4 , —S(═O) 2 R D4 , —S(═O) 2 OR D4 , —OS(═O) 2 R D4 , —S(═O) 2 N(R D4 ) 2 , or —N(R D4 )S(═O) 2 R D4 , substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl; 
 each instance of R D4  is independently hydrogen, substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or two R D4  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring; and 
 p is an integer selected from 0 to 5. 
 
       
     
     
         23 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  is independently hydrogen, substituted or unsubstituted alkyl, 
       
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, halogen, —CN, —OR D4 , —N(R D4 ) 2 , -substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted 5- to 10-membered heteroaryl; 
 each instance of R D4  is independently hydrogen or substituted or unsubstituted C 1-6  alkyl; and 
 p is an integer selected from 0 to 2. 
 
       
     
     
         24 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  join together with the intervening atoms to form a substituted or unsubstituted heterocyclyl or substituted or unsubstituted heteroaryl. 
     
     
         25 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  join together with the intervening atoms to form a substituted or unsubstituted heterocyclyl or substituted or unsubstituted heteroaryl selected from the group consisting of: 
       
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, oxo, halogen, —NO 2 , —CN, —OR D4 , —N(R D4 ) 2 , —C(═O)R D4 , —C(═O)OR D4 , —C(═O)N(R D4 ) 2 , —OC(═O)R D4 , —OC(═O)OR D4 , —N(R D4 )C(═O)R D4 , —OC(═O)N(R D4 ) 2 , —N(R D4 )C(═O)OR D4 , —S(═O) 2 R D4 , —S(═O) 2 OR D4 , —OS(═O) 2 R D4 , —S(═O) 2 N(R D4 ) 2 , or —N(R D4 )S(═O) 2 R D4 , substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl; 
 each instance of R D4  is independently hydrogen, substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or two R D4  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring; and 
 p is an integer selected from 0 to 10. 
 
       
     
     
         26 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  join together with the intervening atoms to form a substituted or unsubstituted heterocyclyl or substituted or unsubstituted heteroaryl selected from the group consisting of: 
       
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, oxo, halogen, —NO 2 , —CN, —OR D4 , —N(R D4 ) 2 , —C(═O)R D4 , —C(═O)OR D4 , —C(═O)N(R D4 ) 2 , —OC(═O)R D4 , —OC(═O)OR D4 , —N(R D4 )C(═O)R D4 , —OC(═O)N(R D4 ) 2 , —N(R D4 )C(═O)OR D4 , —S(═O) 2 R D4 , —S(═O) 2 OR D4 , —OS(═O) 2 R D4 , —S(═O) 2 N(R D4 ) 2 , or —N(R D4 )S(═O) 2 R D4 , substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl; 
 each instance of R D4  is independently hydrogen, substituted or unsubstituted C 1-6  alkyl, substituted or unsubstituted C 2-6  alkenyl, substituted or unsubstituted C 2-6  alkynyl, substituted or unsubstituted C 3-6  carbocyclyl, substituted or unsubstituted 3- to 6-membered heterocyclyl, substituted or unsubstituted C 5-10  aryl, substituted or unsubstituted 5- to 10-membered heteroaryl, an oxygen protecting group when attached to oxygen, a nitrogen protecting group when attached to nitrogen, or two R D4  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring; and 
 p is an integer selected from 0 to 10. 
 
       
     
     
         27 . The compound of any one of  claims 1 - 14 , wherein R 55a  and R 55b  join together with the intervening atoms to form a substituted or unsubstituted heterocyclyl or substituted or unsubstituted heteroaryl selected from the group consisting of: 
       
         
           
           
               
               
           
         
         wherein:
 each instance of R a  is independently hydrogen, oxo, halogen, —CN, —OR D4 , —N(R D4 ) 2 , or substituted or unsubstituted C 1-6  alkyl; 
 each instance of R D4  is independently hydrogen or substituted or unsubstituted C 1-6  alkyl; and 
 p is an integer selected from 0 to 2. 
 
       
     
     
         28 . The compound of any one of  claims 1 - 11 , wherein X is R 55c . 
     
     
         29 . The compound of any one of  claims 1 - 11  and  28 , wherein R 55c  is substituted or unsubstituted phenyl or carbon-bound substituted or unsubstituted heteroaryl containing at least one nitrogen in the heteroaryl ring. 
     
     
         30 . The compound of any one of  claims 1 - 11  and  28 - 29 , wherein R 55c  is substituted or unsubstituted phenyl or carbon-bound substituted or unsubstituted heteroaryl selected from the group consisting of pyridyl, isothiazolyl, thiazolyl, pyrimidyl, pyrazinyl, and oxazolyl. 
     
     
         31 . The compound of any one of  claims 1 - 11  and  28 - 30 , wherein R 55c  is selected from the group consisting of: 
       
         
           
           
               
               
           
         
         wherein: 
         each instance of R a  is independently hydrogen, halogen, —CN, —OR D4 , —N(R D4 ) 2 , —C(═O)R D4 , —C(═O)OR D4 , or substituted or unsubstituted C 1-6  alkyl; 
         each instance of R D4  is independently hydrogen or substituted or unsubstituted C 1-6  alkyl; and 
         p is an integer selected from 0 to 2. 
       
     
     
         32 . The compound of any one of  claims 1 - 31 , wherein R 5  is hydrogen in the cis position, relative to R 19 . 
     
     
         33 . The compound of any one of  claims 1 - 31 , wherein R 5  is hydrogen in the trans position, relative to R 19 . 
     
     
         34 . The compound of any one of  claims 1 - 31 , wherein R 5  is methyl in the cis position, relative to R 19 . 
     
     
         35 . The compound of any one of  claims 1 - 31 , wherein R 5  is methyl in the trans position, relative to R 19 . 
     
     
         36 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-b), (I-c), (I-d), (I-e), (I-l), (I-m), (I-n), or (I-p): 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         37 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-f), (I-g), or (I-h): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         38 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-i), (I-j), or (I-k): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         39 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-o): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         40 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-qq), (I-q), (I-s), (I-t), or (I-u): 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein
 Q, Q′, and Q″ are each independently CR w  or N; 
 R w  is hydrogen, cyano, —NH 2 , or substituted or unsubstituted alkyl; and 
 at least one of Q, Q′, and Q″ is CR w . 
 
       
     
     
         41 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-r): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein
 k is an integer 1 or 2; 
 R z  is substituted or unsubstituted alkyl or substituted or unsubstituted aryl; or two R z s on adjacent carbons combine with the intervening atoms to form a substituted or unsubstituted aryl; and 
 j is an integer 0-6. 
 
       
     
     
         42 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-v), (I-w), or (I-x): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         43 . The compound of  claim 42 , wherein R 55c  is substituted or unsubstituted phenyl or carbon-bound substituted or unsubstituted heteroaryl containing at least one nitrogen in the heteroaryl ring. 
     
     
         44 . The compound of  claim 42  or  43 , wherein R 55c  is substituted or unsubstituted phenyl or carbon-bound substituted or unsubstituted heteroaryl selected from the group consisting of: pyridyl, isothiazolyl, thiazolyl, pyrimidyl, pyrazinyl, and oxazolyl. 
     
     
         45 . The compound of any one of  claims 1 - 44 , wherein R 19  is hydrogen or substituted or unsubstituted alkyl. 
     
     
         46 . The compound of any one of  claims 1 - 45 , wherein R 19  is hydrogen or substituted C 1-6 alkyl. 
     
     
         47 . The compound of any one of  claims 1 - 46 , wherein R 19  is —CH 2 OCH 3 . 
     
     
         48 . The compound of any one of  claims 1 - 45 , wherein R 19  is hydrogen or unsubstituted C 1-6 alkyl. 
     
     
         49 . The compound of any one of  claims 1 - 45  and  48 , wherein R 19  is unsubstituted C 1-6 alkyl. 
     
     
         50 . The compound of any one of  claims 1 - 45  and  48 - 49 , wherein R 19  is methyl. 
     
     
         51 . The compound of any one of  claims 1 - 45  and  48 - 49 , wherein R 19  is ethyl. 
     
     
         52 . The compound of any one of  claims 1 - 51 , wherein R 18  is unsubstituted alkyl. 
     
     
         53 . The compound of any one of  claims 1 - 52 , wherein R 18  is unsubstituted C 1-6 alkyl. 
     
     
         54 . The compound of any one of  claims 1 - 53 , wherein R 18  is methyl. 
     
     
         55 . The compound of any one of  claims 1 - 53 , wherein R 18  is ethyl. 
     
     
         56 . The compound of any one of  claims 1 - 51 , wherein R 18  is substituted alkyl. 
     
     
         57 . The compound of any one of  claims 1 - 56 , wherein R D  is each independently hydrogen, halogen, —CN, —NO 2 , oxo, hydroxy, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, or substituted or unsubstituted carbocyclyl. 
     
     
         58 . The compound of any one of  claims 1 - 57 , wherein R D  is each independently hydrogen, oxo, substituted or unsubstituted alkyl, hydroxy, or substituted or unsubstituted carbocyclyl. 
     
     
         59 . The compound of any one of  claims 1 - 58 , wherein R D  is independently hydrogen, oxo, methyl, ethyl, hydroxy, or cyclopropyl. 
     
     
         60 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-Ib), (I-Ic), (I-Id), (I-Ie), (I-Il), (I-Im), (I-In), (I-Ip1), or (I-Ip2): 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         61 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-If), (I-Ig), or (I-Ih): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         62 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-Ii), (I-Ij), or (I-Ik): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         63 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-Io1) or (I-Io2): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         64 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-Iqq), (I-Iq1), (I-Iq2), (I-It1), (I-It2), (I-Iu1), or (I-Iu2): 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein
 Q, Q′, and Q″ are each independently CR w  or N; 
 R w  is hydrogen, cyano, —NH 2 , or substituted or unsubstituted alkyl; and 
 at least one of Q, Q′, and Q″ is CR w . 
 
       
     
     
         65 . The compound of  claim 64 , wherein R 19  is hydrogen, methyl, ethyl, or methoxymethyl. 
     
     
         66 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-Irr), (I-Ir1) or (I-Ir2): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein
 k is an integer 1 or 2; 
 R z  is substituted or unsubstituted alkyl or substituted or unsubstituted aryl; or two R z s on adjacent carbons combine with the intervening atoms to form a substituted or unsubstituted aryl; and 
 j an integer 0-6. 
 
       
     
     
         67 . The compound of  claim 66 , wherein the compound is a compound of Formula (I-Ir3) or (I-Ir4): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof, wherein
 k is an integer 1 or 2; 
 R z′  is substituted or unsubstituted alkyl or cyano; and 
 j′ an integer 0-4. 
 
       
     
     
         68 . The compound of  claim 1 , wherein the compound is a compound of Formula (I-Iw1), (I-Iw2), (I-Ix1), or (I-Ix2): 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         69 . The compound of any one of  claims 1 - 68 , wherein R 3a  is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl. 
     
     
         70 . The compound of any one of  claims 1 - 69 , wherein R 3a  is substituted or unsubstituted C 1-6  alkyl. 
     
     
         71 . The compound of any one of  claims 1 - 70 , wherein R 3a  is substituted C 1-6  alkyl. 
     
     
         72 . The compound of any one of  claims 1 - 70 , wherein R 3a  is unsubstituted C 1-6  alkyl. 
     
     
         73 . The compound of any one of  claims 1 - 70  and  72 , wherein R 3a  is methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl. 
     
     
         74 . The compound of any one of  claims 1 - 70  and  72 - 73 , wherein R 3a  is methyl. 
     
     
         75 . The compound of any one of  claims 1 - 71 , wherein R 3a  is —CH 2 OCH 3  or CH 2 OCH 2 CH 3 . 
     
     
         76 . The compound of any one of  claims 1 - 71 , wherein R 3a  is —CH 2 C 3 H 5 . 
     
     
         77 . The compound of any one of  claims 1 - 68 , wherein R 3a  is substituted or unsubstituted alkyl or substituted or unsubstituted carbocyclyl. 
     
     
         78 . The compound of any one of  claims 1 - 68 , wherein R 3a  is substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl. 
     
     
         79 . The compound of any one of  claims 1 - 68  and  77 - 78 , wherein R 3a  is substituted or unsubstituted carbocyclyl. 
     
     
         80 . The compound of any one of  claims 1 - 68  and  77 - 79 , wherein R 3a  is cyclopropyl. 
     
     
         81 . The compound of any one of  claims 1 - 80 , wherein R 4a  and R 4b  is each independently hydrogen, halogen, —CN, —NO 2 , substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, —OR E5 , —OC(═O)R E5 , —OS(═O) 2 OR E5 , —N(R E5 ) 2 , or —N(R E5 )C(═O)R E5 , —N(R E5 )S(═O) 2 R E5 , —N(R E5 )S(═O) 2 OR E5 ; wherein each instance of R E5  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, or two R E5  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         82 . The compound of any one of  claims 1 - 80 , wherein R 4a  and R 4b  is each independently hydrogen, halogen, —CN, —NO 2 , —OR F6 , —OC(═O)R F6 , —N(R F6 ) 2 , or —N(R F6 )C(═O)R F6 ; wherein each instance of R F6  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, or two R F6  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         83 . The compound of any one of  claims 1 - 80 , wherein R 4a  and R 4b  are independently hydrogen, —OH, or substituted or unsubstituted C 1-6  alkyl. 
     
     
         84 . The compound of any one of  claims 1 - 80 , wherein each of R 4a  and R 4b  are independently hydrogen, —OH, C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, or C 1-6  alkoxyhalo. 
     
     
         85 . The compound of any one of  claims 1 - 80 , wherein R 4a  and R 4b  are independently —CH 3 , —CH 2 CH 3 , —OH, —OCH 3 , or —CH(CH 3 ) 2 . 
     
     
         86 . The compound of any one of  claims 1 - 80 , wherein R 4a  and R 4b  are both hydrogen. 
     
     
         87 . The compound of any one of  claims 1 - 80 , wherein R 4a  and R 4b  are joined to form an oxo (═O) group. 
     
     
         88 . The compound of any one of  claims 1 - 87 , wherein R 6a  and R 6b  is independently hydrogen, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl. 
     
     
         89 . The compound of any one of  claims 1 - 87 , wherein R 6a  and R 6b  is independently hydrogen or substituted alkyl. 
     
     
         90 . The compound of any one of  claims 1 - 87 , wherein R 6a  and R 6b  is independently hydrogen or unsubstituted alkyl. 
     
     
         91 . The compound of any one of  claims 1 - 87 , wherein both R 6a  and R 6b  are hydrogen. 
     
     
         92 . The compound of any one of  claims 1 - 87 , wherein R 6a  is halogen or alkyl and R 6b  is hydrogen. 
     
     
         93 . The compound of any one of  claims 1 - 87 , wherein R 6a  and R 6b  are both halogen. 
     
     
         94 . The compound of any one of  claims 1 - 87 , wherein R 6a  and R 6b  are both alkyl. 
     
     
         95 . The compound of any one of  claims 1 - 94 , wherein R 7a  and R 7b  is each independently hydrogen, halogen, —CN, —NO 2 , substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, —OR E5 , —OC(═O)R E5 , —OS(═O) 2 OR E5 , —N(R E5 ) 2 , or —N(R E5 )C(═O)R E5 , —N(R E5 )S(═O) 2 R E5 , —N(R E5 )S(═O) 2 OR E5 ; wherein each instance of R E5  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, or two R E5  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         96 . The compound of any one of  claims 1 - 94 , wherein R 7a  and R 7b  is each independently hydrogen, halogen, —CN, —NO 2 , —OR F6 , —OC(═O)R F6 , —N(R F6 ) 2 , or —N(R F6 )C(═O)R F6 ; wherein each instance of R F6  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, or two R F6  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         97 . The compound of any one of  claims 1 - 94 , wherein R 7a  and R 7b  are independently hydrogen, —OH, or substituted or unsubstituted C 1-6  alkyl. 
     
     
         98 . The compound of any one of  claims 1 - 94 , wherein each of R 7a  and R 7b  are independently hydrogen, —OH, C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, or C 1-6  alkoxyhalo. 
     
     
         99 . The compound of any one of  claims 1 - 94 , wherein R 7a  and R 7b  are independently —CH 3 , —CH 2 CH 3 , —OH, —OCH 3 , or —CH(CH 3 ) 2 . 
     
     
         100 . The compound of any one of  claims 1 - 94 , wherein R 7a  and R 7b  are both hydrogen. 
     
     
         101 . The compound of any one of  claims 1 - 94 , wherein R 7a  and R 7b  are joined to form an oxo (═O) group. 
     
     
         102 . The compound of any one of  claims 1 - 101 , wherein R 11a  and R 11b  is each independently hydrogen, halogen, —CN, —NO 2 , substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, —OR E5 , —OC(═O)R E5 , —OS(═O) 2 OR E5 , —N(R E5 ) 2 , or —N(R E5 )C(═O)R E5 , —N(R E5 )S(═O) 2 R E5 , —N(R E5 )S(═O) 2 OR E5 ; wherein each instance of R E5  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, or two R E5  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         103 . The compound of any one of  claims 1 - 101 , wherein R 11a  and R 11b  is each independently hydrogen, halogen, —CN, —NO 2 , —OR F6 , —OC(═O)R F6 , —N(R F6 ) 2 , or —N(R F6 )C(═O)R F6 ; wherein each instance of R F6  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, or two R F6  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         104 . The compound of any one of  claims 1 - 101 , wherein R 11a  and R 11b  are independently hydrogen, —OH, or substituted or unsubstituted C 1-6  alkyl. 
     
     
         105 . The compound of any one of  claims 1 - 101 , wherein each of R 11a  and R 11b  are independently hydrogen, —OH, C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, or C 1-6  alkoxyhalo. 
     
     
         106 . The compound of any one of  claims 1 - 101 , wherein R 11a  and R 11b  are independently —CH 3 , —CH 2 CH 3 , —OH, —OCH 3 , or —CH(CH 3 ) 2 . 
     
     
         107 . The compound of any one of  claims 1 - 101 , wherein R 11a  and R 11b  are both hydrogen. 
     
     
         108 . The compound of any one of  claims 1 - 101 , wherein R 11a  and R 11b  are joined to form an oxo (═O) group. 
     
     
         109 . The compound of any one of  claims 1 - 108 , wherein R 12a  and R 12b  is each independently hydrogen, halogen, —CN, —NO 2 , substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, —OR E5 , —OC(═O)R E5 , —OS(═O) 2 OR E5 , —N(R E5 ) 2 , or —N(R E5 )C(═O)R E5 , —N(R E5 )S(═O) 2 R E5 , —N(R E5 )S(═O) 2 OR E5 ; wherein each instance of R E5  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, or two R E5  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         110 . The compound of any one of  claims 1 - 108 , wherein R 12a  and R 12b  is each independently hydrogen, halogen, —CN, —NO 2 , —OR F6 , —OC(═O)R F6 , —N(R F6 ) 2 , or —N(R F6 )C(═O)R F6 ; wherein each instance of R F6  is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, or two R F6  groups are taken with the intervening atoms to form a substituted or unsubstituted heterocyclic ring. 
     
     
         111 . The compound of any one of  claims 1 - 108 , wherein R 12a  and R 12b  are independently hydrogen, —OH, or substituted or unsubstituted C 1-6  alkyl. 
     
     
         112 . The compound of any one of  claims 1 - 108 , wherein each of R 12a  and R 12b  are independently hydrogen, —OH, C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, or C 1-6  alkoxyhalo. 
     
     
         113 . The compound of any one of  claims 1 - 108 , wherein R 12a  and R 12b  are independently —CH 3 , —CH 2 CH 3 , —OH, —OCH 3 , or —CH(CH 3 ) 2 . 
     
     
         114 . The compound of any one of  claims 1 - 108 , wherein R 12a  and R 12b  are both hydrogen. 
     
     
         115 . The compound of any one of  claims 1 - 108 , wherein R 12a  and R 12b  are joined to form an oxo (═O) group. 
     
     
         116 . The compound of any one of  claims 1 - 115 , wherein R 1a  and R 1b  are independently hydrogen, —OH, or substituted or unsubstituted C 1-6  alkyl. 
     
     
         117 . The compound of any one of  claims 1 - 115 , wherein each of R 1a  and R 1b  are independently hydrogen, —OH, C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, or C 1-6  alkoxyhalo. 
     
     
         118 . The compound of any one of  claims 1 - 117 , wherein R 1a  and R 1b  are both hydrogen. 
     
     
         119 . The compound of any one of  claims 1 - 118 , wherein R 2a  and R 2b  are independently hydrogen, —OH, or substituted or unsubstituted C 1-6  alkyl. 
     
     
         120 . The compound of any one of  claims 1 - 118 , wherein each of R 2a  and R 2b  are independently hydrogen, —OH, C 1-6  alkyl, C 1-6  haloalkyl, C 1-6  alkoxy, or C 1-6  alkoxyhalo. 
     
     
         121 . The compound of any one of  claims 1 - 120 , wherein R 2a  and R 2b  are both hydrogen. 
     
     
         122 . A pharmaceutical composition comprising a compound of any one of  claims 1 - 121  or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient. 
     
     
         123 . A method of treating a CNS-related disorder in a subject in need thereof, comprising administering to the subject an effective amount of a compound of any one of  claims 1 - 121  or a pharmaceutically acceptable salt thereof. 
     
     
         124 . The method of  claim 123 , wherein the CNS-related disorder is a sleep disorder, a mood disorder, a schizophrenia spectrum disorder, a convulsive disorder, a disorder of memory and/or cognition, a movement disorder, a personality disorder, autism spectrum disorder, pain, traumatic brain injury, a vascular disease, a substance abuse disorder and/or withdrawal syndrome, tinnitus, or status epilepticus. 
     
     
         125 . The method of  claim 123 , wherein the CNS-related disorder is depression. 
     
     
         126 . The method of  claim 123 , wherein the CNS-related disorder is postpartum depression. 
     
     
         127 . The method of  claim 123 , wherein the CNS-related disorder is major depressive disorder. 
     
     
         128 . The method of  claim 127 , wherein the major depressive disorder is moderate major depressive disorder. 
     
     
         129 . The method of  claim 127 , wherein the major depressive disorder is severe major depressive disorder.

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