Acta Cryst. (2011). E67, o1876-o1877  [ doi:10.1107/S160053681102527X ]

9-(4-Hydroxyphenyl)-3,3,6,6-tetramethyl-4,5,6,9-tetrahydro-3H-xanthene-1,8(2H,7H)-dione

H.-K. Fun, W.-S. Loh, K. Rajesh, V. Vijayakumar and S. Sarveswari

Abstract: In the title compound, C₂₃H₂₆O₄, the two cyclohexene rings adopt envelope conformations whereas the pyran ring adopts a boat conformation. In the crystal, pairs of intermolecular O-HO hydrogen bonds link the molecules into inversion dimers.

Online 2 July 2011

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