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Three New Triterpene Saponins from Gynostemma pentaphyllum

✍ Scribed by Lin Shi; Jia-Qing Cao; Wei Li; Yu-Qing Zhao

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
188 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Three new dammarane‐type triterpene saponins, 1–3, together with three known compounds, 4–6, were isolated from the aerial parts of Gynostemma pentaphyllum (Thunb.) Makino. By means of chemical and spectroscopic methods, their structures were established as (20__S__)‐3__β__,20,21‐trihydroxydammara‐23,25‐diene 3‐O‐[α‐L‐rhamnopyranosyl‐(1→2)] [β‐D‐xylopyranosyl‐(1→3)]‐β‐D‐glucopyranosyl‐21‐O‐β‐D‐glucopyranoside (1), (20__R__,23__R__)‐3__β__,20‐dihydroxy‐19‐oxodammar‐24‐en‐21‐oic acid 21,23‐lactone 3‐O‐[α‐L‐rhamnopyranosyl‐(1→2)] [β‐D‐xylopyranosyl‐(1→3)]‐α‐L‐arabinopyranoside (2), and (21__S__,23__S__)‐3__β__,20__ξ__,21,26‐tetrahydroxy‐19‐oxo‐21,23‐epoxydammar‐24‐ene 3‐O‐[α‐L‐rhamnopyranosyl‐(1→2)] [β‐D‐xylopyranosyl‐(1→3)]‐α‐L‐arabinopyranoside (3).

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