Patent ID: 8598354

Claim:
A 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 carbonyloxy or carbonyldioxy; R 3 is a diaryl ether; and R 5 and R 7 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; R 6 is H, halogen, alkoxy, alkyl, haloalkyl, aryl, cyano, amino, amido, acyl, carboxyl, substituted carboxyl, or —SO 2 R 10 , wherein R 10 is H, alkyl, amino or haloalkyl; and R 8 is H, halogen, alkoxy, haloalkyl, aryl, nitro, cyano, amino, amido, acyl, carboxyl, substituted carboxyl, or —SO 2 R 10 , wherein R 10 is H, alkyl, amino or haloalkyl; provided that in formula I, R 6 is not H or methoxy; and in formula II that if R 4 is carbonyldioxy then R 7 is not methoxy.