A compound according to Formula (I): wherein: A represents C1-4 alkylene, unsubstituted or optionally substituted by C1-4 alkyl or aryl; or A forms a 5-8 membered fused aliphatic ring with the adjacent phenyl ring; m is an integer from 1 to 3; each R1 is independently selected form the group consisting of halo, C1-4 alkyl, methanesulfonyl, alkoxy, nitrile, dimethylamine, methylenedioxy and CF3; and R2 is hydrogen or methyl is provided.