1,4-Butanediamine, N-methyl-N'-2-propenyl-, dihydrochloride 93565-03-8 Mdl 72431 Mdl-72431 N-Methyl-N'-2-propenyl-1,4-butanediamine dihydrochloride N-Methyl-N-(2-propenyl)-1,4-butanediamine