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Complete assignments of 1 H and 13 C NMR spectral data for three new triterpenoid saponins from Ilex hainanensis Merr.
Author(s) -
Chen XiaoQing,
Yang Jie,
Liu XiaoXiao,
Lai MaoXiang,
Wang Qiang
Publication year - 2009
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2355
Subject(s) - chemistry , triterpenoid , heteronuclear single quantum coherence spectroscopy , heteronuclear molecule , oleanane , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , nuclear overhauser effect , nuclear magnetic resonance spectroscopy , spectroscopy , triterpene , medicine , physics , alternative medicine , pathology , quantum mechanics
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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