Abstract:
A number of constituents were isolated from the root of
Actinidia chinensis Planch. Seven of them were indentified as physcion (emodin-6-methyl ether) (T
1), emodin (frangala-emodin) (T
2), emodin-8-
β-D-glucoside (T
3), questin (emodin-8-methyl ether) (T
5), citreorosein (ω-hydroxyemodin) (T
6), emodic acid (T
7) and
β-sitosterol (T
4).Comparison of the
1HNMR data of emodin (T
2) and its 8-glucoside (T
3) shows that the aromatic proton experiences a downfield shift of about 0.5 ppm upon glycosidation of an ortho phenolic group, a fact which can be used to advantage for the allocation of the glycosidic linkage.