(E)-N,N,N',N'-Tetraethyl-2-butene-1,4-diamine 105-17-9 2-Butene-1,4-diamine, N,N,N',N'-tetraethyl-, (2E)- 2-Butene-1,4-diamine, N,N,N',N'-tetraethyl-, (E)- (8CI)(9CI) EINECS 203-276-2 NSC 75614