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SANGYO KAGAKU KENKYU KYOKAI
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SANGYO KAGAKU KENKYU KYOKAI
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Application filed by SANGYO KAGAKU KENKYU KYOKAIfiledCriticalSANGYO KAGAKU KENKYU KYOKAI
Priority to JP6813876ApriorityCriticalpatent/JPS52151190A/en
Publication of JPS52151190ApublicationCriticalpatent/JPS52151190A/en
PURPOSE: Penicillin ester I (R1 is H, halogen; R is lower alkoxy); e.g. 1'-ethoxycarbonyloxyethyl-6-[D-(-)-α-(4-oxo-4H-1-thiapyran-3-ylcarbonylamino)-3chloro-4-hydroxyphenylacetamido] penicillanate II.