title: 3,9-Dimethyl-2,3-dihydro-phenanthro[1,2-b]furan-4,5-dione.
abstract: The title compound, C(18)H(14)O(3), consists of a four-ring system which contains three six-membered rings forming a phenanthrene-dione system and a five-membered 1,2-dihydro-methyl-furan ring. A three-dimensional supra-molecular framework is formed via non-classical inter-molecular C-H⋯O hydrogen bonds.
authors.forename: Jing-Cai
authors.initials: JC
authors.lastname: Yao
authors.forename: Zhong-Dong
authors.initials: ZD
authors.lastname: Wang
authors.forename: Jin-Bo
authors.initials: JB
authors.lastname: Guo
authors.forename: Li
authors.initials: L
authors.lastname: Zhang