2H-1,5-Benzodioxepine-2,4(3H)-dione, 3,3-di-2-propenyl- 3,3-Di-2-propenyl-2H-1,5-benzodioxepine-2,4(3H)-dione 5-19-05-00201 (Beilstein Handbook Reference) 67170-48-3 BRN 1380695