Patent ID: 6900210

Claim:
A compound of Formula I or a pharmaceutically acceptable salt thereof wherein R 1 is selected from the group consisting of pyridinyl, 3-quinolinyl, thienyl, furanyl, C 3-6 cycloalkyl and phenyl optionally substituted with substituent independently selected from the group consisting of halogen, C 1-4 alkyl, C 1-4 alkoxy, trifluoromethyl, trifluoromethoxy and nitro; A is —CH═CH— or CH 2 ) n —; R 2 is C 1-4 alkyl, CF 3 or hydroxymethyl; R 3 , R 4 , R 5 and R 6 each are independently hydrogen or fluoro; Z is oxygen or —NR 7 (CH 2 ) m —; n is an integer of 0, 1, 2 or 3; m is an integer of 0 or 1; R 7 is hydrogen or C 1-4 alkyl; and B is pyridinyl, pyrimidinyl or pyrazinyl optionally substituted with a subsituent selected from the group consisting of C 1-4 alkyl, halogen, C 1-4 alkoxy and trifluoromethyl.