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Chemical Strucure of an Arabinogalactoglucan from Sweet-scented Oleander Leaves (Nerium indicum)

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Author:
No author available
Journal Title:
CHINESE TRADITIONAL AND HERBAL DRUGS
Issue:
12
DOI:
10.3321/j.issn:0253-2670.1999.12.003
Key Word:
夹竹桃;多糖;阿拉伯半乳

Abstract: 夹竹桃叶用3% Na2CO3 溶液提取,经DEAE-Sephadex A-25阴离子交换层析,Sephadex G-200 凝胶过滤法分离纯化,得到一种中性异多糖NIB-1,分子量为4 300,[α]20D+114.7°(c,0.2,H2O),由L-Ara,D-Gal和D-Glc构成.用化学分析及NMR方法研究了其化学结构,由1,4连接的α-D-葡萄糖残基构成主链,阿拉伯糖和半乳糖分布于支链上,有多种分支形式,分支点在葡萄糖残基的6-O上.

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