by contrast , 7 beta-methoxyiminoacetamido cephalosporins represented by cefotaxime , ceftizoxime , and cefmenoxime were not effective , as indicated by the minimal inhibitory concentrations that inhibited 90 % , 64 , 32 , and 128 micrograms/ml , respectively .
C3536856
cephalosporins
C0007560
ceftizoxime