(3aS,9aS,9bS)-6-methyl-3,9-bis(methylene)-3a,4,5,7,8,9,9a,9b-octahydroazuleno[4,5-b]furan-2(3H)-one InChI=1/C15H18O2/c1-8-4-7-12-10(3)15(16)17-14(12)13-9(2)5-6-11(8)13/h12-14H,2-7H2,1H3/t12-,13-,14-/m0/s azuleno[4,5-b]furan-2(3H)-one, 3a,4,5,7,8,9,9a,9b-octahydro-6-methyl-3,9-bis(methylene)-, (3aS,9aS,9bS)-