Patent ID: 7351842

Claim:
A pharmaceutically acceptable salt of a compound of structural Formula II: wherein R 1 is H or C 1 -C 10 alkyl; R 2 is H or optionally substituted C 1 -C 10 alkyl, heteroalkyl, cycloalkyl or heterocycloalkyl; n=0 to 4; p=0 or 1; R 3 and R 4 are, independently, H or C 1 -C 4 alkyl, and wherein the salt is selected from hydrochloride, hydrobromide, p-toluenesulfonate, phosphate, sulfate, perchlorate, acetate, trifluororacetate, propionate, citrate, malonate, succinate, lactate, oxalate, (L)-tartrate, (D)-tartrate, meso-tartrate, benzoate, alkali metal, morpholine, piperidine, dimethylamine, and diethylamine salts.