ciprofloxacin ciprofloxacin zwitterion 331.13322 1-cyclopropyl-6-fluoro-4-oxo-7-(piperazin-4-ium-1-yl)-1,4-dihydroquinoline-3-carboxylate C17H18FN3O3 PMID:21368411 MetaCyc:CPD-12843 InChI=1S/C17H18FN3O3/c18-13-7-11-14(8-15(13)20-5-3-19-4-6-20)21(10-1-2-10)9-12(16(11)22)17(23)24/h7-10,19H,1-6H2,(H,23,24) CHEBI:192484 331.347 A zwitterion formed from ciprofloxacin by transfer of a proton from the carboxy to the amino group; major species at pH 7.3. chebi_ontology [O-]C(=O)C1=CN(C2CC2)C2=CC(N3CC[NH2+]CC3)=C(F)C=C2C1=O PMID:11202360 PMID:12084502 PMID:9303400 0 MYSWGUAQZAJSOK-UHFFFAOYSA-N zwitterion