Studies on the Constituents of Useful Plants. V. Multisubstituted Flavones in the Fruit Peel of Citrus reticulata and Their Examination by Gas-Liquid Chromatography

Abstract

Thirteen kinds of flavones, including two new flavones, were isolated from the fruit peel of Citrus reticulata Blanco (Rutaceae) on the basis of thorough examination of the components in the chloroform extract of the peel. The structures of these flavones were confirmed by analysis c f the spectral data and by structural conversion or total synthesis. β-Sitosterol, limonin, hesperidin, ferulic acid, and 5,5′-oxydimethylene-bis(2-furaldehyde) were also isolated as components other than flavones. The multisubstituted flavones obtained were examined by gas-liquid chromatography, and may provide a good marker for chemotaxonomical studies of Citrus species. © 1980, The Pharmaceutical Society of Japan. All rights reserved.