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Priority claimed from US06/458,587external-prioritypatent/US4443245A/en
Application filed by Ciba Geigy AgfiledCriticalCiba Geigy Ag
Publication of ZA84312BpublicationCriticalpatent/ZA84312B/xx
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.