Fu Juan, Huang Linfang, Zhang Haitao, Yang Shihai, Chen Shilin
Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
J Asian Nat Prod Res. 2013;15(6):687-92. doi: 10.1080/10286020.2013.778832. Epub 2013 May 10.
A polysaccharide Astragalus polysaccharide (APS) was obtained from the boiling water extract of Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) Hsiao. The results of gas chromatography (GC) indicated that APS consisted of l-rhamnose (l-Rha), d-xylose (d-Xyl), d-glucose (d-Glc), and d-galactose (d-Gal) in the molar ratio of 1:4:5:1.5. Its molecular weight was determined to be 3.01 × 10(5) by high-performance gel filtration chromatography. The results of (1)H NMR and (13)C NMR spectral analysis indicated that APS had a linear backbone mainly consisting of 1,3-linked β-d-Gal residues with insertion of β-Glc, 1,6-linked α-Gal, 1,5-linked β-Xyl, 1,4-linked β-Gal, β-d-Gal, 1,2-linked α-Rha, 1,2,4-linked α-Rha residues. HSQC spectrum indicated that C-2 and C-6 may link with H.
一种多糖黄芪多糖（APS）是从蒙古黄芪（Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) Hsiao）的沸水提取物中获得的。气相色谱（GC）结果表明，APS由L-鼠李糖（L-Rha）、D-木糖（D-Xyl）、D-葡萄糖（D-Glc）和D-半乳糖（D-Gal）组成，其摩尔比为1:4:5:1.5。通过高效凝胶过滤色谱法测定其分子量为3.01×10⁵。¹H NMR和¹³C NMR光谱分析结果表明，APS具有线性主链，主要由1,3-连接的β-D-半乳糖残基组成，并插入了β-葡萄糖、1,6-连接的α-半乳糖、1,5-连接的β-木糖、1,4-连接的β-半乳糖、β-D-半乳糖、1,2-连接的α-鼠李糖、1,2,4-连接的α-鼠李糖残基。HSQC光谱表明C-2和C-6可能与H相连。
