the antibacterial activity of norfloxacin , an organic acid structurally related to nalidixic acid , was compared with that of the oral cephalosporins cefaclor and cephalexin , and with that of nalidixic acid , cinoxacin , amikacin , ampicillin , trimethoprim alone and the combination of trimethoprim and sulfamethoxazole .
C0007537
cefaclor
C0007716
cephalexin