%0 Journal Article
%T 9-(3,4-Dimethoxyphenyl)-3,4,5,6,7,9-hexahydroxanthene-1,8(2H)-dione
%A Sayed Hasan Mehdi
%A Rokiah Hashim
%A Raza Murad Ghalib
%A Chin Sing Yeap
%J Acta Crystallographica Section E
%D 2011
%I International Union of Crystallography
%R 10.1107/s1600536811017867
%X In the title compound, C21H22O5, the mean planes of the pyran and dimethoxyphenyl rings are nearly perpendicular to one another, with the dihedral angle between them being 88.21 (8)¡ã. The pyran ring adopts a boat conformation whereas the two fused cyclohexane rings adopt envelope conformations. In the crystal, molecules are linked into a three-dimensional network by intermolecular C¡ªH...O hydrogen bonds.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536811017867