| abstract |
A compound of formula (I), wherein Ar1 is a thiophene group which may be 2 or 3 thiophene and is optionally substituted with up to one substituent selected from methyl or ethyl; Ar2 is selected from thiophene, furan and substituted phenyl, wherein the substituent on the phenyl group is selected from C1-6 alkyl, halo, C1-6 haloalkyl, C1-6 alkoxy, C1-6 haloalkoxy, cyano and a salt, solvate and hydrate thereof. |