several newly developed antimicrobial agents , including imipenem ( a carbapenem ) and some of the quinolone drugs , i.e. , ci-934 , ciprofloxacin , a-56619 , a-56620 , amifloxacin , norfloxacin , and enoxacin , were tested , as were ampicillin , erythromycin , and vancomycin .
C1136254
antimicrobial agents
C0008809
ciprofloxacin