Patent ID: 7384936

Claim:
A compound of formula III wherein R 1 and R 2 are independently hydrogen, straight chained C 1-6 alkyl group optionally substituted with a phenyl group, branched C 1-6 alkyl group optionally substituted with a phenyl group, or R 1 and R 2 together with the nitrogen atom attached thereto form a 5-7 membered saturated heterocyclic ring optionally containing further nitrogen and/or oxygen heteroatoms, wherein said heterocyclic ring is optionally substituted with one or more hydroxy, oxo or benzyl groups; A is a 5-6 membered N-containing heteroaromatic ring having a N-oxide structure on the nitrogen heteroatom; n is 0, 1, or 2; z is 0 or 1; or a stereoisomer or salt thereof.