Patent ID: 11858919
Assignee: REGENACY PHARMACEUTICALS, INC.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. A compound of Formula II:, or a pharmaceutically acceptable salt thereof;, wherein:
R1 is selected from the group consisting of aryl and heteroaryl, wherein aryl or heteroaryl are optionally substituted with —OH or —OSO2NHCH3;
R2 is selected from the group consisting of absent, alkyl-cycloalkyl, alkyl-heterocycloalkyl, aryl, and heteroaryl;
R3 is selected from the group consisting of absent, alkyl-cycloalkyl, alkyl-heterocycloalkyl, aryl, and heteroaryl;
R4 is selected from the group consisting of —H, —OH, alkyl, aryl, cycloalkyl, and heteroaryl; and
 indicates an optional double bond.