Hydroxy-substituted cephalosporins, particularly 7-(.alpha.-hydroxy-arylacetamido)-3-substituted-3-cephem-4-carboxylic acids of the formula: ##STR1## wherein R is a hydrogen atom, an esterified carboxy or carboxy group, and Y is a lower alkanoyl, lower alkoxy or azido group or a group of the formula: --SR.sub.3 in which R.sub.3 is a heterocyclic residue. These compounds have antibacterial activity against Gram-positive and Gram-negative bacteria.
羟基取代的
头孢菌素,特别是公式为:##STR1## 其中R为氢原子,酯化的羧基或羧基基团,Y为较低的烷酰基,较低的烷氧基或偶氮基或公式为:--SR.sub.3的基团,其中R.sub.3为杂环残基的7-(.alpha.-羟基-芳基乙酰
氨基)-3-取代-3-头孢烯-4-
羧酸。这些化合物对革兰氏阳性和革兰氏阴性细菌具有抗菌活性。