Cephalosporin derivatives, salts thereof, process for their manufacture, and pharmaceutical agents comprising them.

摘要

A cephalosporin derivative represented by the formula wherein R is an organic residue known on beta -lactam antibiotics and Q is a radical of dotted-line means a possible double bond, R1 is hydrogen or mono-valent substitutent, R2, R3 and R4 are mono-valant substituent, respectively, a salt thereof, a process for the manufacture thereof and a pharmaceutical agent comprising same.