3,3a,4,5,7,8,10a,10b-Octahydro-6,10a-dimethyl-3-methylenefuro(3',2':6,7)cyclohepta(1,2-b)pyran-2,9-dione (3aS-(3aalpha,10abeta,10balpha))- 6995-02-4 Furo(3',2':6,7)cyclohepta(1,2-b)pyran-2,9-dione, 3,3a,4,5,7,8,10a,10b-octahydro-6,10a-dimethyl-3-methylene-, (3aS-(3aalpha,10abeta,10balpha))-