16-Oxa­penta­cyclo­[6.6.5.0^1,18.0^2,7.0^9,14]nona­deca-2,4,6,9,11,13,18-heptaen-15-one

In the title compound, C₁₈H₁₂O₂, the benzene rings are inclined to one another by 66.79 (7)°. The five-membered ring is almost planar with a maximum deviation of 0.014 (1) Å. In the crystal, the mol­ecules are linked by pairs of weak C—H...O interactions into centrosymmetric dimers. These dimers are linked by C—H...π interactions, forming a three-dimensional structure.