赤芝孢子粉中一个葡聚糖的分离纯化与结构鉴定

摘要

A water soluble, (1→6)-branched, (1→4) linked D-glucan (LB-B1),[α]21D=+174.2° (c 0.87, H2O), was obtained from a hot-water extract of the sporoderm-broken spores of Ganoderma lucidum (Fr.) Karst by HPSEC, with 0.001 mol/L sodium hydroxide as the eluant, the molecular weight (Mw) of LB-B1 was estimated to be 9.3×103. From the results of total hydrolysis, methylation analysis, acetolysis and 1D, 2D-NMR experimentation, it was concluded that LB-B1 was composed of repeating units with the following structure:%从破壁的赤芝（Ganodermalucidum(Fr.)Karst）孢子粉中分离纯化到一个水溶性的、以1，4连接的D-葡萄糖为主链、在6位接1，6连接葡萄糖的α-D-葡聚糖。高效分子排阻色谱测定，重均分子量为9.3×103，[α]21D=+174.2°(c0.87,H2O)。通过糖组成分析，甲基化反应，乙酰解及一维和二维核磁等光谱解析，确定其结构如下：