Patent ID: 7981927

Claim:
A compound of formula (I) wherein R 1 is selected from the group consisting of hydrogen, —NR A R B , —O—R A , —S—R A and —SO 2 —R A ; wherein R A and R B are each independently selected from the group consisting of hydrogen and C 1-4 alkyl; R 3 is —OH; R 4 is selected from the group consisting of —C 1-4 alkyl, —C 1-4 alkyl-OH, halogenated C 1-4 alkyl, C 2-4 alkenyl, —C 2-4 alkenyl-OH, —C 2-4 alkenyl-CF 3 , —C 2-4 alkynyl, —C 2-4 alkynyl-CF 3 and —C 2-4 alkynyl-phenyl; wherein the phenyl is optionally substituted with one to two substituents independently selected from the group consisting of halogen, C 1-4 alkyl, fluorinated C 1-4 alkyl, C 1-4 alkoxy, fluorinated C 1-4 alkoxy, cyano, nitro, amino, C 1-4 alkylamino and di(C 1-4 alkyl)amino; alternatively, R 3 and R 4 are taken together with the carbon atom to which they are bound to form C(O); or a pharmaceutically acceptable salt or ester thereof.