3-Pyridazinamine, N-(2,5-dimethyl-1H-pyrrol-1-yl)-6-(4-morpholinyl)-, hydrochloride 4-(6-((2,5-Dimethylpyrrol-1-yl)amino)-3-pyridazinyl)morpholine hydrochloride 75841-82-6 86703-02-8 MDL 899 MDL-899 Mopidralazine hydrochloride N-(2,5-Dimethyl-1H-pyrrol-1-yl)-6-(4-morpholinyl)-3-pyridazinamine hydrochloride