Patent ID: 8822467

Claim:
A compound of formula I or salt thereof wherein R 1 , R 2 , R 3 and R 4 are each independently selected from hydrogen and (C 1 -C 6 ) alkyl; R 5 is selected from hydrogen, (C 1 -C 6 ) alkyl and (C 3 -C 8 ) cycloalkyl; R 6 is selected from: a. (C 1 -C 4 ) alkyl, b. (C 3 -C 8 ) cycloalkyl, c. dialkylamino, d. alkylamino, and e. aryl, heteroaryl and arylalkyl, each optionally substituted with one to four substituents independently selected from halogen, cyano, (C 1 -C 6 ) haloalkyl, (C 1 -C 6 ) alkoxy, (C 1 -C 6 ) haloalkoxy, (C 1 -C 6 ) alkyl, and (C 1 -C 6 ) alkylsulfonyl; R 7a is selected from hydrogen and fluoro; R 7b is selected from hydrogen, fluoro and chloro; R 7c is selected from hydrogen, fluoro and chloro; A is selected from aryl and heteroaryl; and W, X, Y and Z are each independently selected from hydrogen, (C 1 -C 6 ) alkyl, halogen, (C 1 -C 6 ) haloalkyl, (C 1 -C 6 ) haloalkoxy, hydroxy, (C 1 -C 6 ) alkoxyalkyl, (C 1 -C 6 ) alkylsulfonyl, (C 1 -C 6 ) alkylaminosulfonyl, carboxamido, cyano, (C 1 -C 6 ) alkoxy, (C 1 -C 6 ) alkoxycarbonyl, aminosulfonyl, dialkylaminosulfonyl, alkylaminocarbonyl, dialkylaminocarbonyl, heterocyclylcarbonyl, heterocyclylacyl, heterocyclylalkyl, and heterocyclyl optionally substituted with (C 1 -C 6 ) alkyl; with the proviso that, when A is phenyl or pyridinyl substituted at the ortho position, any of W, X, Y and Z at said ortho position are each independently selected from hydrogen and halogen.