((2-Aminoethyl)imino)di-2,1-ethanediyl butylcarbamate dihydrochloride 1-Amino-2-bis(n-butylcarbamoyloxyethyl)aminoethane dihydrochloride 118811-38-4 Carbamic acid, butyl-, ((2-aminoethyl)imino)di-2,1-ethanediyl ester, dihydrochloride