Syn-isomer of 3,7-disubstituted-3-cephem-4-carboxylic acid compounds and processes for the preparation thereof

摘要

New syn-isomers of 3-cephem-4-carboxylic acids having anti-bacterial activities, processes for preparation thereof, pharmaceutical compositions thereof, with the acids being substituted at the 3 position with acyloxymethyl, hydroxymethyl, formyl or heterocyclic thiomethyl groups and at the 7 position with alkoxyiminoacetamido substituted with substituted phenyl or substituted thiazolyl.