研究了从中药丹皮(Moutan Cortex)中得到的酸性多糖PSM2b-A的化学结构.实验结果表明PSM2b-A由鼠李糖、阿拉伯糖、葡萄糖、半乳糖、甘露糖和少量蛋白质、糖醛酸组成.甲基化分析、部分酸水解、高碘酸氧化和smith降解等化学方法和IR,13C NMR试验进一步表明PSM2b-A为以(1→6)、(1→4)连接为主链的、带有少量分支的结构复杂的杂多糖,在分子间氢键的作用下能形成高级结构.该多糖化学结构为首次报道.%The structure of an acidic polysaccharide PSM2b-A extracted from the cortex of Paeonia suffruticosa Andr. Has been investigated. The result showed that PSM2b-A was composed of L-Rha,L-Ara,D-Xyl,D-Glc,D-Gal and D-Man containing uronic acid and traces of protein. By using chemical techniques such as methylation analysis, partial acidic hydrolysis, periodate oxidation, Smith degradation and IR,13C NMR spectroscopy, the structure of PSM2b-A was deduced characteristic of a low branched heteropolysaccharide with a linkage of (1→6) , (1→4) as a main chain which could further form into higher structure by means of intermolecular hydrogen bond.
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