Patent ID: 7012071

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 a 5 or 6 membered heteroaromatic ring having 1 or 2 ring heteroatoms selected from N, S and O and the heteroaromatic ring is covalently bound to the remainder of the compound of formula II by a ring carbon; 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.