title: 1-Cyclo-propyl-6-fluoro-7-(4-nitro-so-piperazin-1-yl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid.
abstract: The title compound, C(17)H(17)FN(4)O(4), is a derivative of ciprofloxacin [1-cyclo-propyl-6-fluoro-4-oxo-7-(1-piperazin-yl)-1,4-dihydro-quinoline-3-carboxylic acid]. The crystal packing is stabilized by inter-molecular C-H⋯O hydrogen bonds together with π-π electron ring inter-actions [centroid-centroid separations between quinoline rings of 3.5864 (11) and 3.9339 (13) Å]. A strong intra-molecular O-H⋯O hydrogen bonds is present as well as an intra-molecular C-H⋯F inter-action.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Li-Rong
authors.initials: LR
authors.lastname: Tang
authors.forename: Qiao-Ling
authors.initials: QL
authors.lastname: Zeng
authors.forename: Wei-Jin
authors.initials: WJ
authors.lastname: Chen
authors.forename: Biao
authors.initials: B
authors.lastname: Huang