Novel cephalosporins shown by the general formula: ##STR1## wherein Y is an acyloxy group, a quaternary ammonium group or a group of the formula: --S--R in which R is a nitrogen-containing heterocyclic group, and pharmaceutically acceptable salts thereof have high antibacterial properties against Gram-positive and Gram-negative bacteria including Pseudomonas aeruginosa and Serratia marcescens.
通式为:##STR1## 其中Y是酰氧基,季
铵基或公式为:--S--R的基团,在该基团中R是含氮杂环基团的新型
头孢菌素及其药学上可接受的盐,对革兰氏阳性和革兰氏阴性细菌具有高度的抗菌活性,包括
铜绿假单胞菌和马克色氏菌。