Crystal structure of 6,6′-dimethyl-2H,2′H-3,4′-bichromene-2,2′-dione

In the title compound, the dihedral angle between the two coumarin units is 52.37 (19)°, showing a gauche arrangement across the C—C bond which links the two ring systems. In the crystal, C—H...O hydrogen bonds connect centrosymmetrically-related mol­ecules into dimers.