Patent ID: 8841299

Claim:
A compound of the formula (I): wherein R 1 is selected from the group consisting of C 1-6 alkyl, halo, cyano, C 1-6 hydroxyalkyl, and R 2 is aryl, pyridinyl, piperazinyl or piperidinyl, where said aryl or pyridinyl is optionally substituted by one or three groups independently selected from C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkyl or halogen and where said piperazinyl or piperidinyl is optionally substituted by aryl wherein said aryl is further optionally substituted by one or three groups independently selected from C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkyl or halogen; or, a pharmaceutically acceptable salt thereof.