(E)-Dimethyl 2-(6-benzoyl-7-hydroxy-4-methoxycarbonyl-2-oxo-2H-chromen-8-yl)but-2-enedioate

The molecule of the title compound, C24H18O10, a previously unknown coumarin derivative, contains methoxycarbonyl, 2-butenedioate and benzoyl groups aligned at angles of 28.04 (2), 76.89 (3) and 42.48 (13)°, respectively, to the plane of the coumarin ring system. Intramolecular O—H...O hydrogen bonding between hydroxy and carbonyl groups and weak intermolecular C—H...O hydrogen bonding is present in the crystal structure. The two carbon atoms and attached H atom of the ethylene bond are disordered over two positions, with site occupancy factors of ca 0.9 and 0.1