CRYSTAL OF 6-[4-(4-PYRIDYLAMINO) PHENYL]-4,5-DIHYDRO-3(2H-PYRIDAZINONE HYDROCHLORIDE TRIHYDRATE
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Feb 11, 2008
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Apr 27, 2001
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Abstract
The present invention provides crystals of 6-[4-(4-pyridylamino)phenyl]-4,5-dihydro-3(2H)-pyridazinone hydrochloride trihydrate useful as a medicament for therapeutic treatment of cardiac failure, and the like; and a pharmaceutical composition comprising said crystals as an active ingredient.The crystal of the present invention has characteristic absorption peaks (2θ degrees) at 12.9 (±0.2°) and 19.0 (±0.2°), for example, in powder X-ray diffractometry.
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