Generated: April 26, 2017
|Title:||Donepezil polycrystals and process for producing the same|
|Abstract:||The present invention provides novel polymorphic crystals (A) to (C) having excellent handling properties and an extremely low content of residual solvent of donepezil used as a precursor for production of donepezil hydrochloride having an excellent action as a medicament, and an industrial process for producing the same. Further, the novel polymorphic crystals (A) to (C) according to the present invention are characterized by the powder X-ray diffraction pattern and/or IR absorption peaks of donepezil represented by the following formula: ##STR1##|
|Inventor(s):||Imai; Akio (Ibaraki, JP), Ichinohe; Toshiyuki (Ibaraki, JP), Endo; Takashi (Ibaraki, JP), Tsurugi; Tomio (Ibaraki, JP), Uemura; Makoto (Ibaraki, JP)|
|Assignee:||Eisai Co., Ltd. (Tokyo, JP)|
Patent Claim Types:|
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|Country||Document Number||Estimated Expiration||Supplementary Protection Certificate||SPC Country||SPC Expiration|
|European Patent Office||1048653||► Subscribe|
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