Tectorigenin monohydrate: an isoflavone from Belamcanda chinensis

Abstract

The title compound [systematic name: 5,7-dihydr­oxy-3-(4-hydroxy­phen­yl)-6-meth­oxy-4H-chromen-4-one monohydrate], C16H12O6·H2O, is isolated from Belamcanda chinensis and is said to have anti­microbiotic and anti-inflammatory effects. The chromen-4-one system and the benzene ring are inclined at a dihedral angle of 36.79 (6)°. Molecules are linked by inter- and intramolecular O—H⋯O hydrogen bonds