title: 10-Phenyl-6b,7,8,9,9a,10-hexa-hydro-6H-cyclo-penta-[4,5]pyrano[3,2-c]chromen-6,9-dione.
abstract: In the title compound, C(21)H(16)O(4), the dihedral angle between the phenyl ring and the 2H-chromene ring system is 59.8 (2)°. The crystal packing is stabilized by weak π-π stacking inter-actions [centroid-centroid distances = 3.667 (2) Å] and inter-molecular C-H⋯O hydrogen-bonding inter-actions.
authors.affiliation: Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Qiao
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Dong
authors.initials: D
authors.lastname: Wang