从苋菜（Amaranthus tricolor Linn.）（Amaranthus gangeticus L.）茎的热水提取物中分离得到的杂多糖的结构特征。
Structural characterization of a heteropolysaccharide isolated from hot water extract of the stems of Amaranthus tricolor Linn. (Amaranthus gangeticus L.).
机构信息
Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, West Bengal, India.
出版信息
Carbohydr Res. 2009 Nov 23;344(17):2412-6. doi: 10.1016/j.carres.2009.09.014. Epub 2009 Sep 17.
A water-soluble polysaccharide (PS-I), isolated from the aqueous extract of the stems of Amaranthus tricolor Linn. (Amaranthus gangeticus L.), was found to consist of L-arabinose, methyl-D-galacturonate, D-galactose, and 3-O-Ac-L-rhamnose in a molar ratio of nearly 1:1:1:1. On the basis of total acid hydrolysis, methylation analysis, periodate oxidation, and NMR studies ((1)H, (13)C, TOCSY, DQF-COSY, NOESY, ROESY, HMQC, and HMBC), the structure of the repeating unit of the PS-I is determined as: -->5)-alpha-L-Araf-(1-->4)-beta-D-Galp-(1-->2)-3-O-Ac-beta-L-Rhap-(1-->4)-alpha-D-Gal-A6Me-(1-->
从苋菜（Amaranthus tricolor Linn.，即苋属植物）茎的水提取物中分离得到一种水溶性多糖（PS-I），其由 L-阿拉伯糖、甲基-D-半乳糖醛酸、D-半乳糖和 3-O-Ac-L-鼠李糖以摩尔比约 1:1:1:1 组成。根据完全酸水解、甲基化分析、高碘酸氧化和 NMR 研究（（1）H、（13）C、TOCSY、DQF-COSY、NOESY、ROESY、HMQC 和 HMBC），PS-I 的重复单元结构确定为：[→5]-α-L-阿拉伯呋喃糖基-（1→4）-β-D-半乳糖醛酸-（1→2）-3-O-Ac-β-L-鼠李吡喃糖基-（1→4）-α-D-半乳糖基-A6Me-（1→
Zotero 插件