Abstract
Plantasan, the seed mucilage of Plantago major L.var.asiatica DECAISNE, has been subjected to Smith degradation.The polysaccharide obtained as the degradation product was an arabinoxylan, and the molar ratio of D-xylose: L-arabinose was 9: 1.After methanolysis, the O-methyl derivatives characterised from the methylated polysaccharide were methyl glycosides of 2, 3, 5-trimethyl L-arabinose, 2, 3-dinaethyl D-xylose and 3-methyl D-xylose. As the result of these investigations and periodate oxidation, a possible structure of the arabinoxylan is proposed.In addition to this polysaccharide, glycerol, glycolaldehyde, ethylene glycol, D-xylose, L-arabinose and their glycosides were determined as Smith degradation products obtained from plantasan.
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