9-[(E)-2-(2-Methoxyphenyl)ethenyl]-3,4,5,6,7,9-hexahydro-2H-xanthene-1,8-dione

In the title compound, C22H22O4, the two cyclohexenone rings adopt half-chair conformations, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms by 0.142 (2) and 0.287 (2)Å, respectively. In the crystal, weak C—H...O hydrogen bonds link molecules into chains running parallel to the a axis