Patent ID: 6946491

Claim:
A compound of the formula: wherein n is 1 or 2; t is 0 or 1; m is 0 and r is 1, or m is 1 and r is 0; A is phenyl, unsubstituted or substituted by 1 or 2 groups selected from: halo, alkyl having 1 or 2 carbon atoms, perfluoromethyl, alkoxy having 1 or 2 carbon atoms, and perfluoromethoxy; or cycloalkyl having from 3 to 6 ring carbon atoms wherein the cycloalkyl is unsubstituted or one or two ring carbons are mono-substituted by methyl or ethyl; Z is R 1 is hydrogen or alkyl having from 1 to 7 carbon atoms; R 4 is hydrogen; —NHCOOC(CH 3 ) 3 ; —NHCH 3 ; or —NHCH 2 CH 3 ; or when R 1 is hydrogen, a pharmaceutically acceptable salt of the compound.