fk 749 is a new parenteral cephalosporin derivative which is more active against various gram-negative bacilli , including the opportunistic pathogens such as enterobacter , citrobacter species , and serratia marcescens , than cephalosporins and cephamycins such as cefotiam , cefamandole , cefuroxime , cefotaxime , and cefmetazole .
C0007562
cefuroxime
C0007554
cefotaxime