Crystals of 5-[2-amino-4-(2-furyl) pyrimidin-5-yl]-1-methylpyridin-2(1H)-one and processes for preparing the same
AssigneeEisai R&D Management Co., Ltd.
InventorsHitoshi Harada, Hiroshi Ishihara, Yoshiaki Sato, Hiroyuki Chiba, Teiji Takigawa
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Abstract
Crystals of 5-[2-amino-4-(2-furyl)pyrimidin-5-yl]-1-methylpyridin-2(1H)-one having a diffraction peak at a diffraction angle (2θ±0.2°) of 12.8°, 18.1° and/or 23.5° in a powder X-ray diffraction are excellent in stability against light, therefore are suitable for an active ingredient of a preventing and therapeutic agent for diseases such as constipation.
Claims4
A crystal of 5-[2-amino-4-(2-furyl)pyrimidin-5-yl]-1-methylpyridin-2(1H)-one having a diffraction peak at a diffraction angle (2θ±0.2°) of 12.8°, 18.1° and/or 23.5° in a powder X-ray diffraction.
A crystal of 5-[2-amino-4-(2-furyl)pyrimidin-5-yl]-1-methylpyridin-2(1H)-one having a peak at a chemical shift of approximately 113.1 ppm and/or approximately 140.8 ppm in a 13C solid state NMR spectrum.
Dependencies are inferred from the claim text.