6-Hydroxyluteolin-7-O- beta -D-[2-O- beta -D-xylosylxyloside]: A novel flavone xyloxyloside from Hebe stenophylla

摘要

In the course of a chemotaxonomic study of New Zealand Hebe species, a novel flavone xylosylxyloside, 6-hydroxyluteolin-7-O- beta -D-[2-O- beta -D- xylosylxyloside] has been isolated and characterized from Hebe stenophylla. This compound and the accompanying 6-hydroxyluteolin-7-O- beta -D-[2-O- beta -D- xylosylglucoside] are the major and characteristic flavonoid components of H. stenophylla. Structure identification is based primarily on superior 1H-, superior 1 superior 3C- and 2D-NMR evidence. This is the first recorded isolation of a flavone or flavonol glycoside containing a dixylosyl moiety.