Cephalosporin antibiotics of general formula
(wherein R8 and Rb, which may be the same or different, each represents a hydrogen atom or a methyl or ethyl group, and R represents a 3- or 4-carbamoyl group or a hydrogen atom) and non-toxic salts and non-toxic metabolically labile esters thereof. The compounds exhibit broad spectrum antibiotic activity both in vitro and in vivo, and may be used for treating a variety of diseases caused by pathogenic bacteria in human beings and animals. Pharmaceutical compositions containing the compounds and processes for the preparation of the compounds are also described.
                            通式如下的
头孢菌素类抗生素
(其中 R8 和 Rb 可以相同或不同,各自代表一个氢原子或一个甲基或乙基,R 代表一个 3-或 4-
氨基甲酰基或一个氢原子)及其无毒盐和无毒代谢易变酯。这些化合物在体外和体内均表现出广谱抗生素活性,可用于治疗人类和动物由病原菌引起的各种疾病。此外,还介绍了含有这些化合物的药物组合物以及制备这些化合物的工艺。