title: 3,3-Dimethyl-1,2,3,4,6,11-hexa-hydro-benzo[d]naphtho[2,3-b]furan-1,6,11-trione.
abstract: In the title compound, C(18)H(14)O(4), the cyclo-hexene ring adopts a sofa conformation. In the crystalline state, the mol-ecules are linked into a chain by weak inter-molecular C-H⋯O hydrogen bonds.
authors.affiliation: Department of Chemistry and Chemical Engineering, Southeast University, Nanjing, People's Republic of China.
authors.forename: Huayou
authors.initials: H
authors.lastname: Hu