title: 3,3-Dimethyl-cis-9a,13a-diphenyl-2,3,9a,11,12,13a-hexa-hydro-1H-benzo[h][1,4]dioxino[2',3':5,6][1,4]dioxino[2,3-f]chromene.
abstract: In the title di-hydro-dioxin, C31H28O5, the dioxane ring has a chair conformation, whereas each of the pyran and dioxine rings has an envelope conformation with methyl-ene and quaternary C atoms, respectively, being the flap atoms. The phenyl rings are cis and form a dihedral angle of 82.11 (10)°. The molecular structure is stabilized by C-H⋯O contacts. In the crystal packing, supra-molecular layers parallel to (101) are sustained by C-H⋯π inter-actions.
authors.affiliation: Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23851-970 Seropédica, RJ, Brazil.
authors.forename: Bauer O
authors.initials: BO
authors.lastname: Bernardes
authors.affiliation: Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23851-970 Seropédica, RJ, Brazil.
authors.forename: Aurelio B Buarque
authors.initials: AB
authors.lastname: Ferreira
authors.affiliation: Instituto de Tecnologia em Fármacos-Farmanguinhos, Fundação Oswaldo Cruz, 21041-250 Rio de Janeiro, RJ, Brazil ; Department of Chemistry, University of Aberdeen, Old Aberdeen AB24 3UE, Scotland.
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell
authors.affiliation: CHEMSOL, 1 Harcourt Road, Aberdeen AB15 5NY, Scotland.
authors.forename: Solange M S V
authors.initials: SM
authors.lastname: Wardell
authors.affiliation: Departamento de Química, Universidade Federal Rural do Rio de Janeiro, 23851-970 Seropédica, RJ, Brazil.
authors.forename: José C
authors.initials: JC
authors.lastname: Netto-Ferreira
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink