Provided herein is a compound of Formula I, II, IIIa, IIIb, V, VIa, VIb, VII, VIII, IX, or XI: or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising a compound of Formula I, II, IIIa, IIIb, V, VIa, VIb, VII, VIII, IX, or X, and methods of using the compounds, e.g., in the treatment of CNS-related disorders.

##STR00001##

Provided herein is a compound of Formula (1-I): or a pharmaceutically acceptable salt thereof, wherein R.sup.2a, R.sup.2b, R.sup.3, R.sup.4a, R.sup.4b, R.sup.5, R.sup.6a, R.sup.6b, R.sup.11a, R.sup.11b, R.sup.16a, R.sup.16b, R.sup.19, R.sup.18, X, q, r, s, t, u, and n are defined herein. Also provided herein are pharmaceutical compositions comprising a compound of Formula (1-I) and methods of using the compounds, e.g, in the treatment of CNS-related disorders.

##STR00001##

Provided herein is a compound of Formula (I-I) or a pharmaceutically acceptable salt thereof, wherein t, R.sup.7, R.sup.3, R.sup.9, R.sup.6a, R.sup.6b, R.sup.11a, R.sup.11b, R.sup.15a, R.sup.15b, R.sup.16a, R.sup.16b, R.sup.17a, R.sup.17b, R.sup.18a, R.sup.18b, R.sup.19a, R.sup.19b, R.sup.5a, R.sup.5b, R.sup.8 and R.sup.13 are defined herein. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I-I) and methods of using the compounds, e.g., in the treatment of CNS-related disorders.

##STR00001##

##STR00001##

Provided herein in part is a compound of Formula (I): or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising a compound of Formula I, and methods of using the compounds, e.g, in the treatment of CNS- related disorders.

Provided herein is a compound of Formula I, II, IIIa, IIIb, V, VIa, VIb, VII, VIII, IX, or XI: or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising a compound of Formula I, II, IIIa, IIIb, V, VIa, VIb, VII, VIII, IX, or X, and methods of using the compounds, e.g., in the treatment of CNS-related disorders.

##STR00001##

The present application discloses derivatives of steroids, pharmaceutically acceptable salts, stereoisomers or tautomers thereof, and processes for preparation thereof. The compounds and compositions described herein can be used in therapy.

Provided herein in part is a compound of Formula (I): or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising a compound of Formula I, and methods of using the compounds, e.g, in the treatment of CNS-related disorders.

##STR00001##

Compounds are provided according to Formulae (A-I), (B-I), (C-I), (D-I), (E-I), (F-I), (G-I), and (H-I): and pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof. Compounds of the present disclosure are contemplated useful for the prevention and treatment of a variety of CNS-related conditions.

##STR00001## ##STR00002##

Provided herein is a compound of Formula I, II, IIIa, IIIb, V, VIa, VIb, VII, VIII, IX, or XI: ##STR00001##
or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising a compound of Formula I, II, IIIa, IIIb, V, VIa, VIb, VII, VIII, IX, or X, and methods of using the compounds, e.g., in the treatment of CNS-related disorders.