| abstract |
Compound of formula (I): in which X represents N or CH; R1 represents a hydrogen or halogen atom or a CF3 group; R2 and R3 independently represent a hydrogen atom or a (C1-C4) alkyl group; R4 represents a hydrogen atom or a (C1-C4) alkyl group; n is 0 or 1; A represents a heterocycle chosen from pyridine, pyrimidine, pyrazine and pyridazine optionally mono- ordi-substituted with a (C1-C4) alkyl or (C1-C4) alkoxy group; as well as their N-oxides and their salts or solvates. |