New cephalosporin compounds and the production thereof
申请人:MEIJI SEIKA KAISHA LTD.
公开号:EP0175610A2
公开(公告)日:1986-03-26
A class of new cephalosporin compounds (syn-isomer) is now provided, which is useful as antibacterial agent and is represented by the general formula (I)
wherein R1 is an amino group or a protected amino group; R2 is a lower alkyl group, a carboxymethyl group or a protected carboxymethyl group; R3 is a hydrogen atom, a salt-forming cation or a carboxyl-protecting group; A is an unsubstituted or substituted phenyl group, an unsubstituted or substituted furyl group, an unsubstituted or substituted thiazolyl group or an unsubstituted or substituted 3-lower-alkylthiazolio group, and a pharmaceutically acceptable salt or ester thereof.