Patent ID: 8415394

Claim:
A compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein A and D are independently selected from hydrogen, halogen, nitrile, C 1-3 alkyl, and C 1-3 alkoxy, wherein the latter 2 groups can be optionally substituted by one or more halogen; X is halogen, or C 1-3 alkyl which is optionally substituted by one or more halogen; Y is a bond; Z is aryl or heteroaryl substituted by one or more substituents selected from hydrogen, halogen, nitrile, C 1-6 alkyl, C 1-6 alkoxy, SO 2 C 1-6 alkyl, and heteroaryl, wherein the latter four groups may be optionally substituted by one of more halogen, nitrile or SO 2 C 1-6 alkyl; R 1 and R 2 are independently a hydrogen, or a C 1-3 alkyl group; or R 1 and R 2 together can form a 3-8 membered ring optionally containing one or more groups selected from O, S, and NR 3 and itself optionally substituted by one or more C 1 -C 3 alkyl; and R 3 is hydrogen or C 1 -C 6 alkyl.