1-(2-Hydroxyethyl)-2-imidazolidinethione 1-(2-Hydroxyethyl)ethylenethiourea 2-Imidazolidinethione, 1-(2-hydroxyethyl)- 50354-65-9 932-49-0 N-(2-Hydroxyethyl)ethylenethiourea NSC 36624 NSC 64314