Acta Cryst. (2013). E69, o1347 [ doi:10.1107/S1600536813020357 ]
Abstract: The title compound, C25H29ClO4, adopts a trans conformation about the C=C double bond and the dimethylcyclohexenone rings both show an envelope conformation with the dimethyl-substituted C atom as the flap. In the molecule, the hydroxy and carbonyl groups form two intramolecular O-HO hydrogen bonds typical for xanthene derivatives. In the crystal, weak C-HO hydrogen bonds link the molecules into chains running parallel to the a-axis direction.
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