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Application filed by Pavel Spacek, Miroslav Kubin, Milan BenesfiledCriticalPavel Spacek
Priority to CS754975ApriorityCriticalpatent/CS191474B1/cs
Priority to DE19762633299prioritypatent/DE2633299A1/de
Priority to JP8830076Aprioritypatent/JPS5217590A/ja
Publication of CS191474B1publicationCriticalpatent/CS191474B1/cs
Process for preparing of 7epsilon-(alkoxycarbonyl)-6epsilon-alkyl/halo-17-hydroxy-3-oxo-17alpha-pregn-4-ene-21-carboxylic acid alpha-lactones and corresponding 21-carboxylic acids their salts and esters