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A polysaccharide of Thea sinensis, TSA, has been isolated from the fresh leaves as a majorfraction of polysaccharides. The mol. wt. was estimated to be 850,000 with [α]_D~(15)+ 25.5°(c=0.75,H_2O). The component sugars were determined as L-rhamnose, L-arabinose, and D-galactose in molarratio of 0.54: 1.0: 0.94. The O-acetyl groups locating on galactose residues position 2 were also iden-tified and the content was 3.8％. The ~(13)C NMR spectrum and CrO_3 oxidation of TSA indicated theRhamnose, Arabinose and Galactose to be in α-, α- and β-configurations, respectively. Me-thylation analysis, periodate oxidation, partial hydrolysis and ~(13) C NMR. spectrum showed that TSA.is a branched galactoarabinan.
The polysaccharide of Thea sinensis, TSA, has been isolated from the fresh leaves as a major fraction of polysaccharides. The mol. Wt. Was estimated to be 850,000 with [α] _D ~ (15) + 25.5 ° (c = 0.75, H_2O) . The component sugars were determined as L-rhamnose, L-arabinose, and D-galactose in molar ration of 0.54: 1.0: 0.94. The O-acetyl groups locating on galactose residues position 2 were also iden- tified and the content was 3.8% (13) C NMR spectrum and CrO 3 oxidation of TSA indicated the Rhamnose, Arabinose and Galactose to be in α-, α- and β-configurations, respectively. Me-thylation analysis, periodate oxidation, partial hydrolysis and ~ C NMR. Spectrum showed that TSA. Is a branched galactoarabinan.