| 摘要 |
Cephalosporin antibiotics of general formula <CHEM> (wherein R<a> and R<b>, 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. |
