Crystal of hydrate and process for preparation thereof
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United States of America Patent
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Jun 13, 2000
Grant Date -
N/A
app pub date -
Feb 23, 1998
filing date -
Sep 1, 1995
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Abstract
Dihydrate crystal of 3-[4-(8-fluoro-5,11-dihydrobenz[b]oxepino[4,3-b]pyridin-11-ylidene)piperidino]propionic acid providing high-intensity diffraction peaks at diffraction angles (2.theta.) of about 4.2.degree., 17.0.degree., and 21.3.degree. in a powder X-ray diffraction profile; a medicament comprising the dihydrate crystal; and a process for preparing the dihydrate crystal which comprises the steps of treating a crystalline substance containing an anhydride crystal of the above compound with hydrous acetone, and subjecting the product to drying treatment and moistening treatment.
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