C=C1CC[C@]2(O)[C@@H]1CC1=C(C)C(=O)OC1=C[C@]2(C)O	(5S,5aS,8aR)-5,5a-dihydroxy-1,5-dimethyl-8-methylidene-6,7,8a,9-tetrahydroazuleno[6,5-b]furan-2-one