Cephalosporin antibiotics

摘要

Cephalosporin antibiotics of general formula <IMAGE> (I) (wherein Y(+) represents a C-attached 1-C1-4alkylpyridinium group) exhibit broad spectrum antibiotic activity with unusually high activity against strains of Pseudomonas organisms as well as high activity against various members of the Enterobacteriaceae. The invention also includes the non-toxic salts, non-toxic metabolically labile esters and 1-oxides of compounds of formula (I). Also described are compositions containing the antibiotics of the invention and processes for the preparation of the antibiotics.