The invention relates to compounds of general formula (I):in which X1represents a hydrogen or halogen atom or a group C1-C6-alkyl, C3-C7-cycloalkyl, C3-C7-cycloalkyl-C1-C3-alkylene, C1-C6-fluoroalkyl, cyano, C(O)NR1R2, nitro, C1-C6-thioalkyl, -S(O)-C1-C6-alkyl, -S(O)2-C1-C6-alkyl, SO2NR1R2, aryl-C1-C6-alkylene, aryl or heteroaryl, the aryl and the heteroaryl being optionally substituted； X2represents a hydrogen or halogen atom or a group C1-C6-alkyl, C3-C7-cycloalkyl, C3-C7-cycloalkyl-C1-C3-alkylene, C1-C6-fluoroalkyl, C1-C6-alkoxyl, C3-C7-cycloalkyl-C1-C6-alkylene-O-, C1-C6-fluoroalkoxyl, cyano, C(O)NR1R2, C1-C6-thioalkyl, -S(O)-C1-C6-alkyl, -S(O)2-C1-C6-alkyl, SO2NR1R2, aryl-C1-C6-alkylene, aryl or heteroaryl, the aryl and the heteroaryl being optionally substituted； X3and X4represent, independently of each other, a hydrogen or halogen atom or a group C1-C6-alkyl, C3-C7-cycloalkyl, C3-C7-cycloalkyl-C1-C3-alkylene, C1-C6-fluoroalkyl, C1-C6-alkoxyl, C3-C7-cycloalkyl-C1-C6-alkylene-O-, C1-C6-fluoroalkoxyl, cyano, C(O)NR1R2, nitro, NR1R2, C1-C6-thioalkyl, -S(O)-C1-C6-alkyl, -S(O)2-C1-C6-alkyl, SO2NR1R2, NR3COR4, NR3SO2R5, aryl-C1-C6-alkylene, aryl or heteroaryl, the aryl and the heteroaryl being optionally substituted； Z1, Z2, Z3and Z4represent, independently of each other, a nitrogen atom or agroup C(R6)； n is equal to 0, 1, 2 or 3； Y represents an optionally substituted aryl or heteroaryl； Ra and Rb represent, independently of each other, a hydrogen atom or a group C1-C6-alkyl, C3-C7-cycloalkyl, C3-C7-cycloalkyl-C1-C3-alkylene, C1-C6-fluoroalkyl, hydroxyl, C1-C6-alkoxyl, C3-C7-cycloalkyl-C1-C6-alkylene-O-, C1-C6-fluoroalkoxyl, aryl or heteroaryl, Ra and Rb possibly being substituted； in the form of base or of acid-addition s
