Compounds of formula (I):in which: X represents an optionally substituted phenyl group； R1represents a hydrogen atom, a halogen, a group (C1-C6)alkoxy, a group (C1-C6)alkyl or a group NRaRb； R2represents an optionally substituted heterocyclic group； R3represents a hydrogen atom, a group (C1-C6)alkyl, a group (C1-C6)alkoxy or a halogen atom； R4represents a hydrogen atom, a group (C1-C4)alkyl, a group (C1-C4)alkoxy or a fluorine atom, in the form of the base or of an acid-addition salt.Therapeutic use.本發明提供一種式(I)化合物：其中：X表示視情況經取代之苯基；R1表示氫原子、鹵素、基團(C1-C6)烷氧基、基團(C1-C6)烷基或基團NRaRb；R2表示視情況經取代之雜環基團；R3表示氫原子、基團(C1-C6)烷基、基團(C1-C6)烷氧基或鹵素原子；R4表示氫原子、基團(C1-C4)烷基、基團(C1-C4)烷氧基或氟原子，該化合物係呈鹼或酸加成鹽之形式。本發明亦提供該化合物之治療用途。
