3,5,7-Trimeth­oxy-2-(4-methoxy­phen­yl)-4H-1-benzopyran-4-one

In the title compound, C(19)H(18)O(6), also known as 3,4′,5,7-tetra­methoxy­flavone, the dihedral angle between the benzopyran-4-one group and the attached benzene ring is 11.23 (8)°. An intra­molecular C—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol­ecules are linked into a two-dimensional network parallel to (0[Image: see text]1) by inter­molecular C—H⋯O hydrogen bonds, which generate R (4) (4)(20), R (4) (4)(12) and R (2) (2)(14) ring motifs. Adjacent networks interact by π–π inter­actions between the pyran ring and its methoxy­phenyl substituent [centroid–centroid distance = 3.5267 (8) Å].