3,5,7-Triacet-oxy-2-(3,4-di-acet-oxy-phen-yl)-4H-1-benzo-pyran-4-one

摘要

In the title compound, C 25 H 20 O 12 , commonly known as penta-acetyl-ated quercetin, the benzene ring and one of its meth-oxy substituent groups is disordered (site occupancy ratio 0.523:0.427), with a dihedral angle between the major-disorder component and the benzene ring of the benzo-pyran-one moiety of 10.8?(6)°. In the crystal, C—H?O hydrogen-bonding inter-actions give chains which extend along b .