method for preparation of 7 - it - it's cefalo - sporinen.

摘要

The 7-methoxy-3-heterocyclic thiomethyl cephalosporin derivative possessing excellent antimicrobial activity represented by the general formula IMAGE wherein R1 represents IMAGE group or HOOC- group, R2 represents a nitrogen-containing heterocyclic group, and M represents a hydrogen atom or a cation residue forming a salt.