ciprofloxacin A quinolone that is quinolin-4(1H)-one bearing cyclopropyl, carboxylic acid, fluoro and piperazin-1-yl substituents at positions 1, 3, 6 and 7, respectively. CHEBI:102718 CHEBI:3717 CHEBI:41638 quinolone quinolinemonocarboxylic acid aminoquinoline N-arylpiperazine cyclopropanes quinolone antibiotic fluoroquinolone antibiotic