Acta Cryst. (2003). E59, o667-o669  [ doi:10.1107/S160053680300789X ]

[6a,16b]-cis-7,7-Dimethyl-6,6a,7,16b-tetrahydrochromeno[4',3':3,4]pyrano[3,2-c]--naphthocoumarin

R. Krishna, S. Selvanayagam, M. Yogavel, D. Velmurugan and S. Manikandan

Abstract: In the title compound, C₂₅H₂₀O₄, the dihydropyran rings adopt distorted sofa conformations. The molecule comprises two planar regions which form a dihedral angle of 62.56 (3)°. C-H interactions link the molecules to form centrosymmetric dimeric pairs. The dimers are interlinked along the [101] direction by C-HO hydrogen bonds.

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