摘要:
Compounds of formula (I): wherein: X represents an oxygen or a sulphur or CH2 or R1 and R2 represent a hydrogen atom, or a group as defined in the description, A represents an alkylene chain as described in the description, B is as defined in the description, R3 and R4 represent a hydrogen atom or a group as defined in the description, D represents an optionally substituted benzene, optionally substituted pyrazine, optionally substituted pyrimidine or optionally substituted pyridazine and medicinal products containing the same which are useful in treating or preventing melatoninergic disorders.