Patent ID: 8063077

Claim:
A compound of formula (II): wherein R 1 is selected from the group consisting of halogen, C 1-8 alkyl, C 2-8 alkenyl and C 2-8 alkynyl; R 2 and R 3 are independently selected from the group consisting of hydrogen, halogen, C 1-4 alkyl, SR 4a , S(O)R 4a , and S(O) 2 R 4a ; R 4 is hydrogen, R 4a is hydrogen or C 1-4 alkyl, optionally substituted with from 1 to 2 substituents independently selected from the group consisting of halogen, hydroxyl, alkoxy, heterocyclyl, oxo, amino and carboxyl; R 6 is selected from the group consisting of hydrogen, halogen, and C 1-4 alkyl; or a pharmaceutically acceptable ester or salt thereof.