The invention relates to a compound of the general formula (I) in which R2 is a hydrogen or fluorine atom or a hydroxyl, cyano, trifluoromethyl, C1-6-alkyl, C1-6-alkoxy, NR8R9 group; m, n, o and p are independently an integer equal to 0, 1, 2 or 3; A is a covalent bond or a C1-8-alkylene group; R1 is an optionally substituted aryl or heteroaryl group; R3 is a hydrogen or fluorine atom or a C1-6-alkyl group or a trifluoromethyl group; R4 is an optionally substituted 5-member heterocyclic compound; the compound being in the form of a base or acid addition salt. The invention also relates to the therapeutic use thereof.