4-24-00-01987 (Beilstein Handbook Reference) 5-Methyl-5-(3-methyl-2-butenyl)barbituric acid 66843-01-4 Acide 5-(gamma,gamma-dimethyl-allyl) 5-methyl barbiturique [French] BARBITURIC ACID, 5-METHYL-5-(3-METHYL-2-BUTENYL)- BRN 0173984