fr 17027 inhibited escherichia coli , klebsiella pneumoniae , proteus mirabilis , klebsiella oxytoca , providencia stuartii , providencia rettgeri , and citrobacter diversus at less than or equal to 1 microgram/ml , including isolated resistant to amoxicillin , cephalexin , and cefaclor , but it was less active than ceftizoxime .
C0007716
cephalexin
C0007537
cefaclor