4-25-00-00436 (Beilstein Handbook Reference) 5-Ethyl-5-(1-isopentoxyethyl)barbituric acid 66968-53-4 BARBITURIC ACID, 5-ETHYL-5-(1-ISOPENTOXYETHYL)- BRN 0261528 Barbituric acid, 5-ethyl-5-(1-isopentyloxyethyl)-