CRYSTAL OF 5-[2-AMINO-4-(2-FURYL)PYRIMIDIN-5-YL]-1- METHYLPYRIDIN-2(1H)-ONE AND PROCESS FOR PRODUCING THE SAME

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 (2?±0.2°) of 12.8°, 18.1° and/or 23.5°. This crystal excels in photostability, thereby being suitable for use as an active ingredient of preventive/therapeutic agents for diseases, such as costiveness.