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Priority to CS836731ApriorityCriticalpatent/CS237082B1/cs
Publication of CS673183A1publicationCriticalpatent/CS673183A1/cs
Publication of CS237082B1publicationCriticalpatent/CS237082B1/cs
Procedimiento para preparar derivados del acido 7beta-(carboxialquenoilamino)-(1-o,1-5 o 1-50)-3 cefem-4- carboxilico, y los intermediarios de aplicacion exclusiva en dicho procedimiento.