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    • 4. 发明授权
    • Anhydrous crystals
    • 无水晶体
    • US06169108A
    • 2001-01-02
    • US08913615
    • 1997-11-07
    • Yukio SatoHiroaki KitaokaTatsuya TeradaMakoto Ono
    • Yukio SatoHiroaki KitaokaTatsuya TeradaMakoto Ono
    • A61K3140
    • C07D207/27
    • An anhydrous crystal of a compound represented by the formula: R2—CH2CONH—R1 wherein R1 represents a substituted or non-substituted pyridyl group or substituted or non-substituted phenyl group and R2 represents a substituted or non-substituted 2-oxo-1-pyrrolidinyl group, characterized in that said crystal is substantially free from hygroscopicity. For example, by drying a hydrous crystal of said compound at a temperature of 80° C. or above under reduced pressure, an anhydrous crystal is provided that exhibits a weight increase of 1% or less when stored under the relative humidity of 83% at the temperature of 25° C. for 30 days. By using the anhydrous crystal for the manufacture of a medicament comprising the compound as an active ingredient, a product with a constant content of the active ingredient can be obtained.
    • 由下式表示的化合物的无水晶体:R2-CH2CONH-R1其中R1表示取代或未取代的吡啶基或取代或未取代的苯基,R2表示取代或未取代的2-氧代-1- 吡咯烷基,其特征在于所述晶体基本上没有吸湿性。 例如,通过在减压下在80℃以上的温度下干燥所述化合物的含水结晶,提供无水结晶,当在83%的相对湿度下储存时,其重量增加1%以下 温度为25°C,持续30天。 通过使用无水晶体制造包含该化合物作为活性成分的药物,可以获得具有恒定含量的活性成分的产物。