| 摘要 |
<p>A novel crystal of dihydrate of 3-[4-(8-fluoro-5,11-dihydrobenz[b]oxepino[4,3-b]pyridin-11-ylidene)piperidino]propionic acid giving high-intensity diffraction peaks at angles of diffraction (2 υ) of about 4.2°, 17.0° and 21.3° in the powder X-ray diffractometry; a drug containing this novel crystal; and a process for the preparation of the novel crystal which comprises treating a crystalline substance containing a crystal of anhydride of the above acid with hydrous acetone and subjecting the obtained product to drying and moistening.</p> |
