3-Methyl­benzo[1,2-c:5,4-c′]dichromen-6(8H)-one

The title compound, C₂₁H₁₄O₃, crystallizes with eight independent mol­ecules (A–H) in the asymmetric unit which are arranged in four groups of two mol­ecules each (AB, CD, EF and GH). In each mol­ecule, the pyran-2-one ring is planar (r.m.s. deviations vary from 0.001 to 0.017 Å), while the pyran ring has a screw-boat conformation. In the crystal, mol­ecules stack in two columns, along the [10-1] direction, composed of mol­ecules C, B, E and G, and D, A, F and H. Mol­ecules A and F are linked via C—H...O hydrogen bonds. In addition, there are a number of C—H...π contacts present involving all of the mol­ecules. These inter­actions result in the formation of a three-dimensional network.