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研究了山豆根中一种木葡聚糖的结构．用１ｍｏｌ／ＬＮａＯＨ提取，ＤＥＡＥ－ＳｅｐｈａｄｅｘＡ－２５离子交换柱层析，Ｆｅｈｌｉｎｇ试剂分级得到山豆根木葡聚糖组分ＳＳｂ－１ＦＡ，用完全酸水解，甲基化分析，部分酸水解，三氧化铬氧化和１Ｈ，１３ＣＮＭＲ等方法对其结构进行研究．结果表明：ＳＳｂ－１ＦＡ的分子量为２．６×１０４，比旋光度［α］２０Ｄ＝＋１０．９°（ｃ０．２２，Ｈ２Ｏ），由Ｌ－Ｆｕｃ，Ｄ－Ｘｙｌ，Ｄ－Ｇａｌ和Ｄ－Ｇｌｃ组成，摩尔比为：２．９２９．９７．５５９．８．ＳＳｂ－１ＦＡ由１→４连接的β－Ｄ－Ｇｌｃ残基构成主链，分枝有α－Ｄ－Ｘｙｌ（１→，β－Ｄ－Ｇａｌ（１→２）α－Ｄ－Ｘｙｌ（１→等类型，部分非还原末端由Ｌ－Ｆｕｃ（１→构成．
The structure of a xyloglucan in Radix et Rhizoma is studied. The extracts were extracted with 1mol / L NaOH, DEAE-Sephadex A-25 ion exchange column chromatography and Fehling reagent were used to fractionate the SSb-1FA of the R. sojae xyloglucan. The results of complete acid hydrolysis, methylation analysis, partial acid hydrolysis, Oxidation and 1H, 13CNMR and other methods to study its structure. The results showed that the molecular weight of SSb-1FA was 2.6 × 104, the specific rotation [α] was 20D = + 10.9 ° (c0.22, H2O) Glc composition, the molar ratio: 2.929.97.559.8. SSb-1FA consists of a 1 → 4 linked β-D-Glc residue with a backbone of α-D-Xyl (1 →, β-D-Gal Some types of non-reducing ends of the L-Fuc (1 → form.