Patent ID: 7652015

Claim:
A compound of Formula I: where: Z is selected from the group consisting of X is selected from the group consisting of R 1 is C 1 -C 7 alkyl optionally substituted with one to six substituents selected from the group consisting of halo and C 1 -C 4 alkylhalo; C 3 -C 6 cycloalkyl optionally substituted with one or two substituents selected from the group consisting of C 1 -C 4 alkyl and trifluoromethyl; or trimethylsilyl; R 2 is phenyl optionally substituted with C 1 -C 4 alkyl, or pyridinyl optionally substituted with C 1 -C 4 alkyl; Y is hydrogen, C 1 -C 4 alkyl, halo, or C 1 -C 4 alkylhalo; R 3 is C 1 -C 7 alkyl optionally substituted with C 3 -C 6 cycloalkyl; C 1 -C 4 alkoxy; C 1 -C 4 alkylhalo; C 3 -C 6 cycloalkyl optionally substituted with one to four substituents selected from the group of C 1 -C 4 alkyl and trifluoromethyl; or pyridyl, phenyl or thienyl each optionally substituted with a first substituent selected from the group consisting of: halo, cyano, C 1 -C 4 alkyl, C 1 -C 4 alkylhalo and C 1 -C 4 alkoxy, and optionally further substituted with a second substituent selected from the group of C 1 -C 4 alkyl and halo; R 4 is hydrogen or C 1 -C 4 alkyl; or a pharmaceutically acceptable salt thereof.