Sitafloxacin Impurity 12 Sitafloxacin Sesquihydrate Sitafloxacin RRS isomer tert-Butyl (S)-(5-benzyl-5-azaspiro[2.4]heptan-7-yl)carbamate Sitafloxacin Impurity 14 7-((R)-7amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1R,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid Sitafloxacin RSS isomer Sitafloxacin Impurity 6 Sitafloxacin Impurity 1 7-((2-amino-2-(1-formylcyclopropyl)ethyl)amino)-6-fluoro-1-(2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid DU 6856 (1R,2S)-FLUOROCYCLOPROPYLAMINE TOSYLATE Sitafloxacin Impurity 3 Sitafloxacin Impurity 4 Sitafloxacin Dechloro Impurity Sitafloxacin Sitafloxacin Impurity 5 Sitafloxacin Impurity 1 Sodium Salt