Chemical constituents from the roots of Fallopia convolvulus (L.) A. Löve

Abstract Twenty compounds, including three sterols ( 1 – 3 ), three phenols ( 4 , 14 and 15 ), four anthraquinones ( 5, 7, 8 and 16 ), one chromone ( 6 ), two stilbenes ( 9 and 10 ), three amides ( 11 – 13 ), three flavonoids ( 17 – 19 ) and one organic acid ( 20 ), were obtained by modern phytochemical isolation methods. Their structures were identified by spectroscopic methods and in comparison with the published data in the references. Among them, compound 2 , 3 , 11 and 13 were firstly discovered from genus Fallopia , and compounds 1 , 5 – 8 , 10 , 14 , 15 , 17 , 19 and 20 were obtained from F. convolvulus for the first time. The chemotaxonomic significance of these compounds was also discussed, which revealed the relationships between F. convolvulus and some other species of Polygonaceae family.