4-24-00-02018 (Beilstein Handbook Reference) 5-(2-Isopentenyl)-5-isopropylbarbituric acid 5-Isopropyl-5-(3-methyl-2-butenyl)barbituric acid 67051-26-7 BARBITURIC ACID, 5-(2-ISOPENTENYL)-5-ISOPROPYL- BRN 0211373