1,2-ethanediamine, N,N,N',N'-tetramethyl- 7677-21-6 InChI=1/C6H16N2/c1-7(2)5-6-8(3)4/h5-6H2,1-4H N,N,N',N'-tetramethylethane-1,2-diamine N,N,N',N'-tetramethylethylenediamine