title: [Behaviors of crystalline waters of (RS)-7-(2-aminomethylmorpholino)-1- cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid].
abstract: Physicochemical characteristics of crystalline water of (RS)-7-(2-aminomethylmorpholino)-1-cyclopropyl-6,8-difluoro-1,4-di hydro-4-oxo-3-quinoline-carboxylic acid were studied by thermal analyses and powder X-ray diffractometry. The dihydrate of the compound was stable under ambient or humidified conditions. The dihydrate converted to a monohydrate on drying under mild conditions. The mono- and dihydrates transformed into alpha-type anhydrate at 110 degrees C. These three kinds of crystals were convertible each other under appropriate conditions. At 165 degrees C, the hydrates and the alpha-anhydrate converted to beta-type anhydrate. The compressed effects on the crystalline waters were also discussed for the dihydrate by kinetic analyses.
authors: Research Laboratories, Yoshitomi Pharmaceutical Industries, Ltd., Fukuoka, Japan.
authors: K
authors: K
authors: Imamura
authors: N
authors: N
authors: Oishi
authors: Y
authors: Y
authors: Ishida
authors: K
authors: K
authors: Ogawa
authors: K
authors: K
authors: Araki
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002939:Ciprofloxacin / Q000031:analogs & derivatives* / Q000737:chemistry; D003460:Crystallization; D013816:Thermodynamics; D014867:Water; D014961:X-Ray Diffraction
chemical_list: D014867:Water; C078843:7-(2-aminomethylmorpholino)-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid; D002939:Ciprofloxacin