3(2H)-Pyridazinone, 4-((3-(diethylamino)propyl)amino)-6-ethoxy-2-phenyl-, hydrochloride, hydrate (2:2:1) 4-((3-(Diethylamino)propyl)amino)-6-ethoxy-2-phenyl-3(2H)-pyridazinone hydrochloride 1/2H2O UR6322000