In the title compound, C26H30O7, one atom in the cyclo-hexa-none ring is disordered over two positions with a site-occupancy ratio of 0.871 (6):0.129 (6). The dihedral angles formed between the mean plane through the six C atoms of the major component of the cyclo-hexa-none ring and two benzene rings are 35.09 (10) and 34.21 (10)°; the corresponding angles for the minor component are 20.1 (2) and 19.5 (2)°. Both the major and minor disordered components of the cyclo-hexa-none ring adopt half-boat conformations. In the crystal packing, inter-molecular C - H⋯O hydrogen bonds connect the mol-ecules into a three-dimensional network.