title: 2,3:6,7-Bis(methyl-enedi-oxy)-phenanthrene.
abstract: In the title mol-ecule, C(16)H(10)O(4), all the non-H atoms are coplanar. The crystal structure is stabilized by weak inter-molecular C-H⋯O contacts and π-π stacking inter-actions (the inter-planar distance is 3.43 Å).
authors.forename: Yuan-Xing
authors.initials: YX
authors.lastname: Wang
authors.forename: Chong-Bo
authors.initials: CB
authors.lastname: Liu
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Fang
authors.forename: Ming-Yong
authors.initials: MY
authors.lastname: Xie
authors.forename: Xiao-Bo
authors.initials: XB
authors.lastname: Hu