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Triterpenoids and Saponins from the Leaves of Uncaria hirsuta

✍ Scribed by Wen-Bo Xin; Gui-Xin Chou; Zheng-Tao Wang

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
240 KB
Volume
92
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

magnified image

Three new triterpenoids, (3__β__)‐3‐hydroxy‐27‐noroleano‐13(28)‐lactone (1), (22__α__)‐22‐hydroxy‐3‐oxo‐urs‐12‐ene‐27,28‐dioic acid (4), and (3__β__)‐3‐(β‐D‐glucopyranosyloxy)‐12‐oxopyroquinovic acid β‐D‐glucopyranosyl ester (7), together with four known compounds, pyrocincholic acid ethyl ester (2), pyrocincholic acid (3), quinovic acid (5), and (3__β__)‐3‐(β‐D‐quinovopyranosyloxy)pyrocincholic acid β‐D‐glucopyranosyl ester (6), were isolated from the EtOH extract of the leaves of Uncaria hirsuta Haviland. Their structures were determined by means of spectroscopic analyses, including HR‐ESI‐MS and 2D‐NMR techniques. The configuration of 1 was confirmed by X‐ray analysis; 2 is an artefact, as verified by the HPLC and LC/MS analysis.

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