Patent ID: 8461122

Claim:
A compound of formula (I): wherein: R1 is a 5-membered aromatic heterocyclic group optionally substituted with one or more substituents chosen from halogen atoms and groups (C 1 -C 4 )alkyl, halogen, hydroxyl, oxo, halo(C 1 -C 4 )alkyl, halo(C 1 -C 4 )alkyloxy, (C 1 -C 4 )alkyloxy, aryl(C 1 -C 4 )alkyl and aryl, the said aryl group being optionally substituted with one or more groups chosen from the groups (C 1 -C 4 )alkyl, halo(C 1 -C 4 )alkyl, hydroxyl and (C 1 -C 4 )alkyloxy, or an acid-addition salt, a hydrate or a solvate thereof.