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Plant mucilages 24. structural features of althaea mucilage o a representative mucous poly saccharide from the roots of althaea officinalis



Plant mucilages 24. structural features of althaea mucilage o a representative mucous poly saccharide from the roots of althaea officinalis



Annual Report of the Kyoritsu College of Pharmacy (25): 73-76



Partial acid hydrolysis of Althaea-mucilage O, a representative mucous polysaccharide isolated from the roots of A. officinalis, led to the isolation of 5 oligosaccharides. Analysis of their components, and reduction, methylation and partial degradation studies showed that these oligosaccharides are O-.alpha.-(D-galactopyranosyluronic acid)-(1 .fwdarw. 2)-L-rhamnopyranose, O-.beta.-(D-glucopyranosyluronic acid)-(1 .fwdarw. 3)-O-.alpha.-(D-galactopyranosyluronic acid)-(1 .fwdarw. 2)-L-rhamnopyranose, and the hexasaccharide, the nonasaccharide and the dodecasaccharide composed of a repeating unit having the structure of the trisaccharide through position 4 of the D-galacturonic acid residue. The polysaccharide was subjected to chromium trioxide oxidation, and to controlled Smith degradation. The configuration and the mode of branching were determined. The structural features of the mucilage are discussed.

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Accession: 006126242

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