2,2'-((1,2-Diethylethylene)bis(p-phenyleneoxy))bis(triethyl)amine 2691-45-4 69-14-7 EINECS 220-261-6 Hexestrol bis(diethylaminoethyl ether) Hexestrol-4,4'-bis(2-diethylaminoethylether) N,N,N',N'-Tetraethyl-N,N'-(2,2'-(4,4'-(1,2-diethylethylen)diphenoxy)diethyl)diamin