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