Patent ID: 8759360

Claim:
A compound of the formula: wherein; R 1 is C 1 or CH 3 ; R 2 is OH, OCH 3 , CH 2 OH or CH 2 OCH 3 ; R 3 is H or combines with R 4 to form a fused pyrrolidin-2-one; R 4 is C 1 -C 2 alkyl, C 1 -C 2 fluoroalkyl, C(O)CH 3 or CO 2 CH 3 ; R 5 is H, CH 3 or CH 2 OCH 3 ; R 6 is H, CH 3 or combines with R 5 to form a cyclopropane ring; and n is 0 or 1; or a pharmaceutically acceptable salt thereof.