1,4-Bis((2-mercaptoethyl)amino)-2,3-butanediol dihydrochloride 1,4-N-Thioethyl-2,3-dihydroxydiaminobutane dihydrochloride 18239-81-1 2,3-BUTANEDIOL, 1,4-BIS((2-MERCAPTOETHYL)AMINO)-, DIHYDROCHLORIDE