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A new compound [C_(19)H_(19)N_3O_3F_2Cl·C_4H_3O_4·H_2O](I),(7-((7S)-7-aminospiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1R,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid fumaric acid monohydrate), was synthesized and struc