Pristinaymcinia or virginiamycin derivatives and their preparation
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United States of America Patent
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Apr 19, 1994
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Jul 2, 1992
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Dec 5, 1989
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Abstract
This invention relates to a process for preparing synergistic derivatives of formula (I), in which Y is hydrogen or dimethylamino, from pristinamycin I.sub.A or from virginiamycin, via a Mannich base, followed by elimination of the amine introduced. ##STR1##
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