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Six New Triterpenoid Glycosides from Gynostemma pentaphyllum

✍ Scribed by Jie-Qing Liu; Cui-Fang Wang; Jian-Chao Chen; Shang-Hui Tu; Hong-Fei Gu; Wen-Xiang Hu; Ming-Hua Qiu

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

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✦ Synopsis

Six new triterpenoid glycosides, gynosaponins I -VI (1 -6, resp.), together with three known compounds, ginseng Rb 1 (7), gypenoside XLIX (8), and gylongiposide I (9), were isolated from the aerial parts of Gynostemma pentaphyllum. Based on ESI-MS, IR, 1D-and 2D-NMR data (HMQC, HMBC, COSY, and TOCSY), the structures of the new compounds were determined as (3b,12b,20S)-

-b-glucopyranoside (5), and (3b,12b,20S)-trihydroxydammar-24-ene 3-O-{[b-glucopyranosyl-(1 ! 2)]-b-glucopyranosyl}-20-O-[a-rhamnopyranosyl-(1 ! 2)] [a-rhamnopyranosyl-(1 ! 3)]-b-glucopyranoside (6). 101.8 C(2'')

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