主权项 |
1. A compound of formula or pharmaceutical salts thereof:wherein A and B are individually an C, O, N or S and R1 is an alkyl or an alkenyl and R2 is a phenyl, benzyloxyl, pyridyl, indolone, pyrrol, carbamoyl, pyridine, substituted phenyl, substituted benzyloxyl, substituted pyridine, or substituted pyridyl and R3-R6 are individually a hydrogen, an anime or a halogen. |