title: 1,5,7,8',11-Penta-meth-oxy-13H-spiro-[dibenzo[a,g]fluorene-13,1'(4'H)-naphthalen]-4'-one toluene monosolvate.
abstract: In the title compound, C(35)H(28)O(6)·C(7)H(8), the dihedral angle between the mean planes through the naphthalene ring systems of the dibenzo[a,g]fluorene moiety is 22.44 (3)°. The aromatic ring system of the naphthalenone unit is approximately perpendicular to the mean plane of the five-membered ring, forming a dihedral angle of 87.51 (5)°. An intra-molecular C-H⋯O hydrogen bond is observed. In the crystal, pairs of C-H⋯π inter-actions link the mol-ecules, forming inversion dimers.
authors.affiliation: Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture & Technology, 2-24-16 Naka-machi, Koganei, Tokyo 184-8588,  Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Takeuchi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nagasawa
authors.forename: Akiko
authors.initials: A
authors.lastname: Okamoto
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Yonezawa