| 摘要 |
Crystal of 5-[2-amino-4-(2-furyl)pyrimidin-5-yl]-1-methylpyridin-2(1H)-one exhibiting, in powder X-ray diffractometry, diffraction peaks at diffraction angles (2theta±0.2°) of 9.7° and/or 21.9°. This crystal is suitable for use as an active ingredient of preventive/therapeutic agents for diseases, such as costiveness. Further, a hydrate of 5-[2-amino-4-(2-furyl)pyrimidin-5-yl]-1-methylpyridin-2(1H)-one and 5-[2-amino-4-(2-furyl) pyrimidin-5-yl]-1-methylpyridin-2(1H)-one in amorphous form are also suitable for use as an active ingredient of preventive/therapeutic agents for diseases, such as costiveness.
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