2H,4H-Benzo(1,2-b:4,3-c')dipyran-2,6(8H)-dione, 9,10-dihydro-5-hydroxy-4,8,8-trimethyl- 83-85-2 9,10-Dihydro-5-hydroxy-4,8,8-trimethyl-2-H,4-H-benzo(1,2-b-4,3-c)-dipyran-2,6(8H)-dione Fuscin