Complete assignments of (1)H and (13)C NMR data for two 3beta,8beta-epoxymexicanolides from the fruit of a Chinese mangrove Xylocarpus granatum.

Abstract

Three 3beta,8beta-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.

• Authors: Jun Wu, Zhihui Xiao, Yang Song, Si Zhang, Qiang Xiao, Cha Ma, Haixin Ding, Qingxin Li
• Journal: Magnetic resonance in chemistry : MRC (Magn Reson Chem) Vol. 44 Issue 1 Pg. 87-9 (Jan 2006) ISSN: 0749-1581 [Print] England
• PMID: 16261504 (Publication Type: Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• 6-acetoxycedrodorin
• Carbon Isotopes
• Epoxy Compounds
• Limonins
• Triterpenes
• xyloccensin K
• xyloccensin W
• Hydrogen

Topics

• Carbon Isotopes (chemistry)
• China
• Epoxy Compounds (chemistry, isolation & purification, standards)
• Fruit (chemistry)
• Hydrogen (chemistry)
• Limonins
• Magnetic Resonance Spectroscopy (standards)
• Meliaceae (chemistry)
• Molecular Conformation
• Reference Standards
• Reproducibility of Results
• Triterpenes (chemistry, isolation & purification, standards)