title: 5,5',7,7'-Tetra-meth-oxy-2,2'-ethano-1,1'-spiro-biindane.
abstract: In the title compound, C(23)H(26)O(4), there is a dihedral angle of 83.7 (6)° between the two benzene rings. The five-membered rings have chair conformations.
authors.affiliation: School of Chemistry and Materials Science, Shannxi Normal University, Xi'an 710062, People's Republic of China.
authors.forename: Wu-Xin
authors.initials: WX
authors.lastname: Hu
authors.forename: Jun-Fa
authors.initials: JF
authors.lastname: Wei
authors.forename: Xian-Ying
authors.initials: XY
authors.lastname: Shi