PREPARATION OF 7BETAA*44CARBOXYBUTYLAMIDO**7ALPHAAMETHOXYY 33CEPHEMM44 CARBOXYLIC ACID DERIVATIVES

摘要

PURPOSE:To obtain high-purity title compounds in high yield by treating in the presence of H2O2 7beta-(5-amino-5-carboxyvaleramido)-7alpha-methoxy- 3 - cephem - 4 - carboxylic accid with microorganism cells having activity to oxidases for D-amino acid or with substance obtained by treating these cells.