Acta Cryst. (2012). E68, o245 [ doi:10.1107/S1600536811054730 ]
Abstract: In the title compound, C21H21NO6, each of the cyclohexenone rings adopts a half-chair conformation. Each of the pairs of hydroxy and carbonyl O atoms are oriented to allow for the formation of intramolecular O-HO hydrogen bonds, which are typical of xanthene derivatives.
Online 23 December 2011
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