The present invention relates to compounds corresponding to formula (I):in which:A represents a divalent aromatic radical;X represents a —CH— group or a nitrogen atom;R1 represents a (C1-C4)alkyl or a (C1-C4)alkoxy;R2 represents a group Alk;R3 represents a hydroxyl or a group —NR7R8;R4 represents a hydrogen atom, a halogen atom, a cyano, a phenyl, a groupAlk, a group OAlk or a group —NR9R10;R5 represents a hydrogen atom, a halogen atom or a group Alk;R6 represents a hydrogen atom, a halogen atom, a cyano, a group —COOAlk or a —CONH2 group.