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Complete assignments of 1H and 13C NMR spectral data for three new triterpenoid saponins from Ilex hainanensis Merr.

✍ Scribed by Xiao-Qing Chen; Jie Yang; Xiao-Xiao Liu; Mao-Xiang Lai; Qiang Wang

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
112 KB
Volume
47
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Three new oleanane‐type triterpenoid saponins, ilexhainanoside C, D and E, all with 24, 28‐dioic acid groups, were isolated from the leaves of Ilex hainanensis. They were 3β‐hydroxyolean‐12‐ene‐24, 28‐dioic acid‐28‐O‐β‐D‐glucopyranoside(1), 3β, 19α‐dihydroxyolean‐12‐ene‐24, 28‐dioic acid‐28‐O‐β‐D‐glucopyranoside(2) and 3β, 29‐dihydroxyolean‐12‐ene‐24, 28‐dioic acid‐28‐O‐β‐D‐glucopyranoside(3). The structures of these three new compounds were elucidated and complete assignments of the ^1^H and ^13^C NMR spectroscopic data were achieved by 1D and 2D NMR experiments [heteronuclear single quantum coherence (HSQC), HMBC and rotational nuclear Overhauser effect spectroscopy (ROESY)]. Copyright © 2008 John Wiley & Sons, Ltd.

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