(3aS,6S,6aR,9aS,9bR)-6a-hydroxy-6,9a-dimethyl-3-methylenedecahydroazuleno[4,5-b]furan-2,9-dione InChI=1/C15H20O4/c1-8-4-5-10-9(2)13(17)19-12(10)14(3)11(16)6-7-15(8,14)18/h8,10,12,18H,2,4-7H2,1,3H3/t8-,10-,12+,14-,15+/m0/s azuleno[4,5-b]furan-2,9-dione, decahydro-6a-hydroxy-6,9a-dimethyl-3-methylene-, (3aS,6S,6aR,9aS,9bR)-