| abstract |
Compound of formula I: or formula II, or a pharmaceutically acceptable salt of formula I or formula II, wherein: R 1 is H, hydroxyl, alkoxy, acyl, alkyl, cycloalkyl, aryl, or heteroaryl; R 2 is methyl, haloalkyl, or heteroaryl; R 4 is hydroxyl, carbonyloxy, or carbonyldioxy; R 5 , R 6 , R 7 and R 8 are each individually H, halogen, alkoxy, alkyl, haloalkyl, aryl, nitro, cyano, amino, amido, acyl, carboxyl, substituted carboxyl, or -SO 2 R 10, wherein R 10 is H, alkyl, amino or haloalkyl; and R 3 is |