Patent ID: 7612212

Claim:
A compound of formula I: wherein: R1 is selected from the group consisting of bromo, iodo, ethynyl, cycloalkyl, alkoxy, azetidinyl, acetyl, heterocycyl, cyano, straight-chained alkyl and branched-chain alkyl; R2 is selected from the group consisting of hydrogen, chloro, fluoro, and alkyl; R3 is selected from the group consisting of hydrogen and fluoro; R4 is selected from the group consisting of optionally substituted aryl, alkyl, and cycloalkyl; R5 is selected from the group consisting of hydrogen and wherein R6 is selected from the group consisting of hydroxyl, alkoxy, cycloalkyl, trihaloalkyl, alkyl, optionally substituted aryl, and optionally substituted heteroaryl; R7 and R8 are independently selected from the group consisting of hydrogen, alkyl, and trihaloalkyl; or R6 and R7 can together form a cycloalkyl group and R8 is hydrogen; and pharmaceutically acceptable salts or esters thereof.