Complete assignments of (1)H and (13)C NMR data for two 3beta,8beta-epoxymexicanolides from the fruit of a Chinese mangrove Xylocarpus granatum.
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.
Wu
Jun
J
Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, P. R. China. wwujun2003@yahoo.com
Xiao
Zhihui
Z
Song
Yang
Y
Zhang
Si
S
Xiao
Qiang
Q
Ma
Cha
C
Ding
Haixin
H
Li
Qingxin
Q
D002247:Carbon Isotopes / Q000737:chemistry; D002681:China; D004852:Epoxy Compounds / Q000737:chemistry* / Q000302:isolation & purification / Q000592:standards; D005638:Fruit / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D036701:Limonins; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D029582:Meliaceae / Q000737:chemistry*; D008968:Molecular Conformation; D012015:Reference Standards; D015203:Reproducibility of Results; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification / Q000592:standards
C508292:6-acetoxycedrodorin; D002247:Carbon Isotopes; D004852:Epoxy Compounds; D036701:Limonins; D014315:Triterpenes; C508294:xyloccensin K; C508293:xyloccensin W; D006859:Hydrogen