the in vitro activities of the new spectinomycin analog u-63366 , the new macrolide roxithromycin ( ru 28965 ) , and five new quinolone derivatives ( pefloxacin , rosoxacin , norfloxacin , ofloxacin , and ciprofloxacin ) were studied against 23 multiresistant strains of haemophilus ducreyi ( beta-lactamase producers ) isolated in paris and were compared with the activities of tetracycline , minocycline , chloramphenicol , streptomycin , kanamycin , gentamicin , spectinomycin , erythromycin , and nalidixic acid .
C0035891
roxithromycin
C0014806
erythromycin