Patent ID: 11939317
Assignee: RIGEL PHARMACEUTICALS, INC.
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC C

Claim 0:
1. A compound, having a formula 1, or a salt thereof, wherein:
ring A is heteroaryl;
R1 is H, aliphatic, or heteroaliphatic;
R2 is H, aliphatic, heteroaliphatic, or heterocyclyl;
each of Z1, Z2, Z3, and Z4, independently is N or CR3, wherein at least one of Z1, Z2, Z3, and Z4 is N;
each R3 independently is H, aliphatic, or heteroaliphatic; and
R4 is halogen, heterocycloaliphatic, aromatic, —O-aromatic, or —NH-aromatic.