abstract |
Preparation procedure for streptogramins of general formula (I): in which either R1 is methyl or ethyl, R2 is H and X and Y together form an oxo radical, either R1 is ethyl, R2 and X represent H and Y is H or OH, either R1 is ethyl, R2 is OH, and X and Y together form an oxo radical, by demethylation of a synergistin derivative of general formula. |