Publisher： John Wiley & Sons Inc
E-ISSN： 1600-5368|63|12|o4903-o4904
ISSN： 1600-5368
Source： Acta Crystallographica Section E, Vol.63, Iss.12, 2007-12, pp. : o4903-o4904
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Abstract
The title xanthone compound, C20H20O6, was isolated from the roots of Cratoxylum formosum ssp. pruniflorum. The xanthone ring system is essentially planar. The 3‐methylbut‐2‐enyl substituent plane is not coplanar with the attached benzene ring, the dihedral angle being 62.59 (12) Å. The two methoxy groups are twisted away from the mean plane of the attached benzene ring. The two hydroxy groups are coplanar with the attached benzene rings and contribute to O—H...O intramolecular hydrogen bonds which generate S(5) and S(6) ring motifs. In the crystal structure, intermolecular O—H...O hydrogen bonds and weak C—H...O intermolecular interactions connect the molecules into infinite one‐dimensional chains along the [201] direction. The crystal is further stabilized by C—H...π interactions.
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