4-25-00-00433 (Beilstein Handbook Reference) 5-Ethyl-5-(ethylthiomethyl)-2-thiobarbituric acid 66968-43-2 Acido 5-etil-5'-(etiltiometilen)-2-tiobarbiturico [Italian] BARBITURIC ACID, 5-ETHYL-5-(ETHYLTHIOMETHYL)-2-THIO- BRN 0219337