Patent ID: 6740777
Filing Date: 2004-05-25
Classification: A61P,C07C

Abstract:
A compound of formula Ia or a pharmaceutically acceptable equivalent: wherein:R1, R2, R3, and R4 are independently hydrogen or C1-C3 alkyl; and A1, A2, A3, and A4 are independently hydrogen, C1-C9 alkyl, C2-C9 alkenyl, C2-C9 alkynyl, aryl, heteroaryl, carbocycle, heterocycle, halo, hydroxy, sulfhydryl, nitro, amino, cyano, isocyano, thiocyano, isothiocyano, formamido, thioformamido, sulfo, sulfino, C1-C9 alkylsulfonyl, C1-C9 alkoxy, C2-C9 alkenoxy, phenoxy, or benzyloxy, wherein said alkyl, alkenyl, alkynyl, aryl, heteroaryl, carbocycle, heterocycle, alkoxy, alkenoxy, phenoxy, and benzyloxy are independently unsubstituted or substituted with one or more substituent(s).