Patent ID: 6875777

Claim:
A compound of the formula I wherein R 1 is selected from any one of (i) phenyl; wherein each R 1 phenyl ring and R 1 heteroaromatic ring may optionally and independently be substituted by 1, 2 or 3 substituents selected from the group consisting of: straight and branched C 1 -C 6 alkyl, NO 2 , CF 3 , C 1 -C 6 alkoxy, chloro, fluoro, bromo, and iodo, and wherein substitutions on said phenyl ring and on said heteroaromatic ring may take place in any ring position; R a and R b is each and independently selected from any one of hydrogen, a straight and branched C 1 -C 6 alkyl, NO 2 , CF 3 , C 1 -C 6 alkoxy, chloro, fluoro, bromo, and iodo; as well as pharmaceutically acceptable salts thereof.