| 摘要 |
The subject of the invention is the compounds of formula (I): <IMAGE> in which, - either X and X' form C=O or C=NOR with R=H, heterocycle, alkyl, alkenyl, alkynyl, optionally substituted, <IMAGE> Ra, Rb being a hydrocarbon radical or forming with the nitrogen atom a heterocycle, and X' = H, - Y and Y' have the same meaning as X and X', - B = H, OR4, R4 = H, or forms with A a carbonate or a carbamate, - A = OR'4, R'4 = H or forms with B a carbonate <IMAGE> n = integer from 1 to 6 R2 = alk or CONH2, CONHCOR11 or CONHSO2R11, R11, hydrocarbon up to 18c. <IMAGE>
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