Patent ID: 11952364
Assignee: TYLIGAND BIOSCIENCE (SHANGHAI) LIMITED
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 8:
9. A compound of formula III-a, isomers thereof or their pharmaceutically acceptable salts or solvates, , wherein
R1 is C1-6 alkyl;
R2 is —NRaRb or —ORb;
R3 and R4 are each independently selected from H or halogen;
Ra and Rb are each independently selected from H, C1-6 alkyl optionally substituted by one or more halogens, or C3-6 cycloalkyl optionally substituted by one or more halogens, or Ra and Rb together with the N to which they are attached form a 3-6 membered ring optionally substituted by one or more halogens.