3(2H)-Pyridazinone, 6-(2-ethyl-1H-imidazol-1-yl)-, hydrazone, dihydrochloride, hemihydrate 6-(2-Ethyl-1-imidazolyl)-3-hydrazinopyridazine dihydrochloride hemihydrate Pyridazine, 6-(2-ethyl-1-imidazolyl)-3-hydrazino-, dihydrochloride, hemihydrate UR6025000