Patent ID: 7829713

Claim:
A compound of formula I: wherein: R 1 is H, (C 1 -C 6 )alkyl, aryl, aryl(C 1 -C 6 )alkyl, indolyl; n is 1; m is 1; W is O or two hydrogens; X is N—Y—R 4 ; Y is a direct bond or CH 2 ; R 4 is H, (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy, (C 1 -C 6 )alkanoyl, hydroxy, (C 1 -C 6 )alkoxycarbonyl, carboxy, aryl, or aryl(C 1 -C 6 )alkyl; Z has the following formula: wherein R 2 is methyl and R 3 is cyclopropyl or cyclopentyl; wherein the ring containing X is optionally substituted on carbon with one or more halo, (C 1 -C 6 )alkyl, or (C 1 -C 6 )alkoxy; or a pharmaceutically acceptable salt thereof; and wherein if R 1 is H, R 4 cannot be aryl(C 1 -C 6 )alkyl.