title: 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.affiliation: 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
authors.forename: Jun
authors.initials: J
authors.lastname: Wu
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Xiao
authors.forename: Yang
authors.initials: Y
authors.lastname: Song
authors.forename: Si
authors.initials: S
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Xiao
authors.forename: Cha
authors.initials: C
authors.lastname: Ma
authors.forename: Haixin
authors.initials: H
authors.lastname: Ding
authors.forename: Qingxin
authors.initials: Q
authors.lastname: Li
mesh_terms: 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
chemical_list: C508292:6-acetoxycedrodorin; D002247:Carbon Isotopes; D004852:Epoxy Compounds; D036701:Limonins; D014315:Triterpenes; C508294:xyloccensin K; C508293:xyloccensin W; D006859:Hydrogen