Cephalosporin compound, method of its production and composition for prevention and treatment of bacterial infectious diseases.

摘要

A cephalosporin compound represented by the formula (I): <CHEM> wherein R<1> represents a hydrogen atom or alpha -amino acid residue (ester bonding), its ester, or its pharmacologically acceptable salt, which is useful as a preventive, therapeutic drug for bacterial infections as well as an intermediate for the synthesis of other cephalosporin compounds, a method of its production, a pharmaceutical composition for prevention and treatment of bacterial infectious diseases and method for the treatment of bacterial infectious diseases.