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Priority to JP733181ApriorityCriticalpatent/JPS5226048B2/ja
Publication of JPS4987118ApublicationCriticalpatent/JPS4987118A/ja
Priority to SE7416062Aprioritypatent/SE7416062L/xx
Publication of JPS5226048B2publicationCriticalpatent/JPS5226048B2/ja
C07D499/00—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring