Syn isomers of 3-substituted 7-[2-substituted imino-2-substituted acetamido]-3-cephem-4-carboxylic acid and salt bacteriostatic-compounds and pharmaceutical compositions thereof and processes for preparing same.
3-取代基7-[2-取代基
亚胺基-2-取代基乙酰胺基]-3-头孢烯-4-
羧酸的同分异构体及其盐、抑菌化合物和药物组合物以及其制备方法。