[Isolation and structure elucidation of glycosides in n-butanol extracts from rhizome of Periploca calophylla].

To study the chemical constituents from n-butanol extracts of Periploca calophylla.The constituents were isolated and purified by chromatographic technology and their structures were elucidated on the basis of physicochemical property and spectroscopic methods.Eight glycosides were isolated and identified as periplocin (I), kaempferol 3-alpha-D-arabinoside (II), kaempferol 3-O-beta-D-glucoside (III), 3',4',5,7-tetrahydroxyflavanone-2(S)-3'-O-beta-D-glucopyranoside (IV), (+)-syringaresinol-4'-O-beta-D-monoglucoside (V), 1-sinapoylglucoside (VI), erigeside C (VII), 2,6-dimethoxy-4-hydroxyphenol 1-O-beta-D-glucoside (VIII).All the compounds were isolated for the first time from this plant.