twelve 4-quinolones ( cinoxacin , ciprofloxacin , enoxacin , flumequin , nalidixic acid , norfloxacin , oxolinic acid , pefloxacin , pipemidic acid , rosoxacin , and piromidic and beta-hydroxypiromidic acids ) and novobiocin , were used at subinhibitory concentrations to eliminate from escherichia coli 11 antibiotic resistance plasmids belonging to different incompatibility groups .
C0034428
quinolones
C0008809
ciprofloxacin