2-(5,7-dihydroxy-4-oxo-4H-chromen-3-yl)-5-methoxy-1,4-benzoquinone (isoflavonequinone)

In the title molecule, 5,7-dihydroxy-4'-methoxyisoflavonequinone, C16H10O7, the dihedral angle between the chromene moiety and the cyclohexa-1,4-diene ring is 51.72 (5)degrees. The molecular structure is stabilized by an intramolecular O-H...O hydrogen bond. In the crystal structure, intermolecular O-H...O hydrogen bonds link the molecules to form chains along the c axis. Adjacent molecular chains are linked along the b axis by C-H...O hydrogen bonds to form a network.