2,2,2',2'-tetramethyl-[3,3'-bipyrano[3,2-g]chromene]-8,8'(2H,2'H)-dione

(E)-7-((3-(tetrahydro-5,5-dimethyl-4-hydroxy-2-furanyl)-2-butenyl)oxy)-2H-1-benzopyran-2-one