Patent ID: 6960584

Claim:
A compound of the formula A: wherein R 1 represents phenyl, furyl, thienyl or pyridinyl, any of which groups may be optionally substituted with one, two or three substituents, independently selected from: a) halogen; b) C 1-4 alkyl; c) C 1-4 alkoxy; d) cyano; e) di(C 1-4 alkyl)amino; f) hydroxy; R 2 represents amino-C 1-6 alkyl, C 1-4 alkylamino-(C 1-6 )alkyl, di(C 1-4 alkyl)amino-(C 1-6 )alkyl, or C 1-4 alkoxy-(C 1-6 )alkyl; and R 3 is selected from: C 3-7 cycloalkyl and aryl; or a pharmaceutically acceptable salt or stereoisomer thereof.