1,4-Bis(.beta.-hydroxyethoxy)-2-butyne 1,4-Di(.beta.-hydroxyethoxy)-2-butyne 1606-85-5 2,2'-(2-Butyne-1,4-diyldioxy)diethanol Ethanol, 2,2'-(2-butynylenedioxy)di- Ethanol, 2,2'-[2-butyne-1,4-diylbis(oxy)]bis- NSC73709