CEPHALOSPORINVERBINDUNGEN.

摘要

A new cephalosporin compound is now provided, which is useful as antibacterial agent and is represented by the general formula (I) (I) wherein R1 is an amino group or a protected amino group; R2 is a hydrogen atom, a salt-forming cation or a carboxyl-protecting group; R3 is a hydrogen atom, a halogen atom, a lower alkylthio group, a lower alkoxyl group, a vinyl group or a group of the formula: -CH2Y where Y is a hydrogen atom, a halogen atom, an acyloxy group, an unsubstituted or substituted heterocyclic thio group or an unsubstituted or substituted pyridinio group, and a pharmaceutically acceptable salt or ester thereof.