10-(1,1-Dimethyl-2-propenyl)-5-((1,1-dimethyl-2-propenyl)oxy)-8,8-dimethyl-2H,8H-benzo(1,2-b:5,4-b')dipyran-2-one 2H,8H-Benzo(1,2-b:5,4-b')dipyran-2-one, 10-(1,1-dimethyl-2-propenyl)-5-((1,1-dimethyl-2-propenyl)oxy)-8,8-dimethyl- 88223-89-6 C24-H28-O4 Ponfolin