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A hypoglycaemic constituent, panaxan A, isolated from the roots of Panax ginseng , was revealed to be a glycan with molecular weight of ca. 14000. Spectroscopic and degradative studies demonstrated that panaxan A is mainly composed of α - 1 →; 6 linked D -glucopyranose residues having branching at the C-3 position, the ratio of terminals, branching positions and intermediate units being ca. 1:1:2.
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TOMODA et al. (1984) studied this question.
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