Chemical and spectroscopic studies of Cercidium praecox gum exudate.
The structure of the polysaccharide from Cercidium praecox (R&P) Harms gum exudate has been studied by Smith degradation, by sugar and methylation analyses, and by 13C NMR spectroscopy. The results showed a (1-->4)-xylan core. Some xylose residues are substituted at O-2 by alpha-D-glucuronic acid and 4-O-methyl-alpha-D-glucuronic acid residues. beta-D-Glucuronic acid is present, probably as terminal residues. The arabinose is present as alpha-L-furanose and beta-L-pyranose.
León de Pinto
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Centro de Investigaciones en Química de los Productos Naturales, Facultad de Humanidades y Educación, Universidad del Zulia, Maracaibo, Venezuela.
Martínez
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Rivas
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D001089:Arabinose / Q000032:analysis; D002240:Carbohydrate Sequence; D002854:Chromatography, Paper; D007887:Fabaceae / Q000737:chemistry*; D005965:Glucuronates / Q000032:analysis; D020723:Glucuronic Acid; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal; D011134:Polysaccharides / Q000737:chemistry*; D014990:Xylans / Q000737:chemistry; D014994:Xylose / Q000032:analysis
D005965:Glucuronates; D010936:Plant Extracts; D011134:Polysaccharides; D014990:Xylans; D020723:Glucuronic Acid; D014994:Xylose; D001089:Arabinose