Patent ID: 8426448

Claim:
A compound of the formula R 1 is selected from the group consisting of hydrogen, chloro, cyano, trifluoromethyl, difluoromethoxy, and trifluoromethoxy; R 2 is selected from the group consisting of hydrogen, halo, cyano, (C 1 -C 3 ) alkyl substituted with from 1 to 5 fluoro groups, and (C 1 -C 3 ) alkoxy substituted with from 1 to 5 fluoro groups; R 3 is selected from the group consisting of hydrogen, fluoro, and chloro; R 4 is selected from the group consisting of trifluoromethyl, cyano and cyclopropyl; provided that, when R 1 is hydrogen, chloro, cyano, or trifluoromethyl, then R 2 is (C 1 -C 3 ) alkoxy substituted with from 1 to 5 fluoro groups; or a pharmaceutically acceptable salt thereof.