Patent ID: 7704993

Claim:
A compound of Formula (I): wherein: R 1 is H or C 1-8 alkyl; R 2 is C 1-4 alkyl, —CH 2 —O—C 1-4 alkyl, C 1-4 haloalkyl or CH 2 OH; and R 3 , R 4 , R 5 and R 6 are each independently H, C 1-4 alkyl, amino, cyano,halogen, C 1-4 haloalkyl, nitro or OH; or a pharmaceutically acceptable salt thereof; provided that when R 2 is C 1-4 alkyl, —CH 2 —O—C 1-4 alkyl, or CH 2 OH then R 3 and R 6 are not both hydrogen.