Patent ID: 8252798

Claim:
A compound of the formula: wherein; R 1 is selected from H, F, Cl, C 1 -C 2 alkyl, CF 3 , cyclopropyl, OCH 3 , OCF 3 and CN; R 2 is selected from tetrahydrofuranyl, tetrahydropyranyl, azetidinyl-1-carboxylic acid methyl ester and tetrahydrothiophenyl-1,1-dioxide; R 3 is H or combines with R 4 together with the atoms to which they are attached to form a fused pyrrolidin-2-one; R 4 is selected from C 1 -C 2 alkyl, C 1 -C 2 fluoroalkyl, cyclopropyl and COCH 3 ; R 5 is selected from H, CH 3 and CF 3 ; n is 0 or 1; X 1 and X 3 are independently selected from N, CH and CR 6 ; X 2 is selected from CH and CR 6 ; with the proviso that only one of X 1 , X 2 and X 3 may be other than CH; R 6 is selected from F, Cl, CF 3 , OCH 3 and OCF 3 ; or a pharmaceutically acceptable salt thereof.