Acta Cryst. (2007). E63, o523-o525  [ doi:10.1107/S1600536806056108 ]

Isoderrone

J. J. B. Kezetas, B. Ndjakou Lenta, S. Ngouela, E. Tsamo, N. Sewald, B. Neumann and H.-G. Stammler

Abstract: The title compound, C₂₀H₁₆O₅, also known as 5,7-dihyroxy-3-(2',2'-dimethyl-2H'-chromen-7'-yl)chroman-4-one, was isolated from the medicinal plant Ficus mucuso. The benzopyranone (chromen-4-one) ring system is essentially planar and the dihedral angle between the benzopyranone ring system and the other benzene ring is 37.7 (10)°. In the crystal structure, one-dimensional chains are formed via intermolecular O-HO hydrogen bonds.

Online 10 January 2007

Copyright © International Union of Crystallography
IUCr Webmaster