Patent ID: 7683097

Claim:
A compound of formula or a pharmaceutically acceptable salt thereof, wherein R 1 is a member selected from the group consisting of hydrogen, (C 1 -C 8 )alkyl, (C 1 -C 8 )heteroalkyl, (C 3 -C 8 )heterocycloalkyl(C 1 -C 8 )alkyl and aryl(C 1 -C 8 )alkyl; R 2 is a member selected from the group consisting of Z is a bond; and R 3 is a member selected from the group consisting of hydrogen, halogen, alkyl, alkoxy, hydroxy, halo(C 1 -C 6 )alkyl, heteroalkyl, —NO 2 , —CN, —CH 2 CN, —SR 9 , —O—S(O)R 9 , —S(O) 2 R 9 , and —S(O)R 9 , wherein R 9 is a member selected from the group consisting of (C 1 -C 4 )alkyl, amino and alkylamino.