Acta Cryst. (2010). E66, o3035 [ doi:10.1107/S1600536810043795 ]
Abstract: In the title compound, C31H28O4, the asymmetric unit contains two crystallographically independent molecules. In these two molecules, the four dihedral angles between each pair of phenyl rings on the same C atoms are 75.4 (1), 83.0 (1), 85.0 (1) and 80.4 (2)°. All of the nonplanar six-membered heterocycles adopt chair conformations. Intermolecular C-H and weak C-HO interactions link the molecules and are effective in the stabilization of the crystal structure.
Online 31 October 2010
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