| 摘要 |
Compounds of formula (I): wherein: X represents oxygen or sulphur or a group CH2 or R<1>, R<2>, R<3>, R<4>, R<5 >and R<6 >are as defined in the description, A represents an alkylene chain as defined in the description, B represents alkyl or alkenyl substituted by a group or R<9>, or B represents a group or R<9>, D represents a benzene, pyridine, pyrazine, pyrimidine or pyridazine nucleus. Medicaments
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