Non-alkaloid components from Uncaria sinensis (Oliv.) Havil. and their chemotaxonomic significance

Ten non-alkaloid compounds (1-10) including one aromatic compound, one anthraquinone, two triterpenoids and five flavonoids were isolated from Uncaria sinensis (oliv.) Havil. for the first time, except compounds 3 and 9. The chemotaxonomic significance of these compounds was summarized.   Key words: Uncaria sinensis (oliv.) Havil., Rubiaceae, natural products, chemotaxonomic studies.