(3S,3aS,5aR,9aS,9bS)-3,5a-dimethyl-9-methylene-3a,5,5a,9,9a,9b-hexahydronaphtho[1,2-b]furan-2,6(3H,4H)-dione InChI=1/C15H18O3/c1-8-4-5-11(16)15(3)7-6-10-9(2)14(17)18-13(10)12(8)15/h4-5,9-10,12-13H,1,6-7H2,2-3H3/t9-,10-,12+,13-,15-/m0/s naphtho[1,2-b]furan-2,6(3H,4H)-dione, 3a,5,5a,9,9a,9b-hexahydro-3,5a-dimethyl-9-methylene-, (3S,3aS,5aR,9aS,9bS)-