- Streptogramin derivatives, their preparation and compositions containing them
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Group A streptogramin derivatives of general formula (I) in which:R1 represents a halogen atom or an azido or thiocyanato radical,R2 represents a hydrogen atom or a methyl or ethyl radical,R3 represents a hydrogen atom, or the residue of an aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic or heterocyclylaliphatic ester which may be substituted, andthe bond - - -represents a single bond (stereochemistry 27R) or a double bond,as well as its salts when they exist.
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