a new cephalosporin derivative , ceftizoxime ( syn fk 749 ) , and its anti isomer , fr 14060 , were compared in antibacterial activity , outer membrane permeability , stability to beta-lactamases , and affinity for penicillin-binding proteins ( pbps ) , using escherichia coli nihj jc-2 and enterobacter cloacae 58-5 as the test organisms .
C3536856
cephalosporin
C0007560
ceftizoxime