Abstract: Compound corresponding to the general formula (I) in which R1, R2, R3, R4 and R5 each represent a hydrogen or halogen atom or a nitro, amino, trifluoromethyl, trifluoroalkoxy, cyano, hydroxyl, (C1–C6)alkyl or (C1–C6)alkoxy group and R6 represents a (C1–C6)alkyl group. Therapeutic application.