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The title compound, C 21 H 14 O 3 , 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.

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