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Complete assignments of 1 H and 13 C NMR data for two 3β,8β‐epoxymexicanolides from the fruit of a Chinese mangrove Xylocarpus granatum
Author(s) -
Wu Jun,
Xiao Zhihui,
Song Yang,
Zhang Si,
Xiao Qiang,
Ma Cha,
Ding Haixin,
Li Qingxin
Publication year - 2006
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.1713
Subject(s) - chemistry , mangrove , two dimensional nuclear magnetic resonance spectroscopy , carbon 13 nmr , heteronuclear single quantum coherence spectroscopy , stereochemistry , proton nmr , confusion , nmr spectra database , spectral line , physics , astronomy , psychoanalysis , ecology , biology , psychology
Three 3β,8β‐epoxymexicanolides, including xyloccensin K, 6‐acetoxycedrodorin and a new one named xyloccensin W, were isolated from the fruit of a Chinese mangrove Xylocarpus granatum . Their structures were determined by spectroscopic analyses. The first complete assignment of 1 H and 13 C NMR data for xyloccensin W was achieved by means of 2D NMR techniques, including 1 H‐ 1 H COSY, HSQC, HMBC and NOESY spectra. In addition, the confusion of 1 H and 13 C NMR data previously reported for xyloccensin K was clarified. Copyright © 2005 John Wiley & Sons, Ltd.