1,2-Ethanediamine, N-methyl-N'-(4-methyl-6-phenyl-3-pyridazinyl)-, hydrochloride, hydrate (2:4:1) 86672-44-8 N-Methyl-N'-(4-methyl-6-phenyl-3-pyridazinyl)-1,2-ethanediamine dihydrochloride hemihydrate SR 95029