2-O-(α-D-Galaktopyranosyluronsaeure)-L-rhamnose | 16749-72-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-O-(α-D-Galaktopyranosyluronsaeure)-L-rhamnose
• 英文别名: 2-O-(α-D-Galactopyranosyluronsaeure)-L-rhamnose；2-O-(alpha-D-Galactopyranosyluronic Acid)-L-rhamnose；(2S,3R,4S,5R,6S)-3,4,5-trihydroxy-6-[(3R,4R,5R,6S)-2,4,5-trihydroxy-6-methyloxan-3-yl]oxyoxane-2-carboxylic acid
• CAS: 16749-72-7
• 化学式: C₁₂H₂₀O₁₁
• 分子量: 340.284
• InChiKey: SILSJWQOMSRYIY-LLNWBHJYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -3.4
• 重原子数：
  23
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  186
• 氢给体数：
  7
• 氢受体数：
  11

反应信息

• 作为产物：
  描述：

  alkaline earth salt of/the/ methylsulfuric acid 在 硫酸 作用下， 反应 2.0h， 以3.9 mg的产率得到β-D-GlcA(p)1-3-α-D-GalA(p)1-2-L-Rha(p)
  参考文献：
  名称：

  植物黏液。XLII。锦葵（Malva sylvestris var）叶片的一种反互补黏液。毛里求斯。

  摘要：

  从锦葵（Malva sylvestris L. var。）的叶子中分离出一种称为MSL-M的粘液。毛里塔尼亚米尔。在电泳和凝胶色谱上是均匀的。其在水溶液中的特性粘度值为12.0，并且其分子量估计为约6.0×10（6）。主要成分是由L-鼠李糖：D-半乳糖：D-半乳糖醛酸：D-葡萄糖醛酸组成的酸性多糖，其摩尔比为6：3：2：2。黏液和羧基还原衍生物的甲基化分析，碳13核磁共振和部分水解研究表明了其主要结构特征。它具有相当大的反补体活性。

  DOI：

  10.1248/cpb.37.3029

文献信息

• Plant mucilages. XXIV. The structural features of althaea-mucilage O, a representative mucous polysaccharide from the roots of Althaea officinalis.
  作者：MASASHI TOMODA、NORIKO SATOH、KAZUYO SHIMADA

  DOI：10.1248/cpb.28.824

  日期：——

  Partial acid hydrolysis of Althaea-mucilage O, a representative mucous polysaccharide isolated from the roots of Althaea officinalis L., led to the isolation of five oligosaccharides. Analysis of their components, as well as reduction and methylation, and partial degradation studies showed that these oligosaccharides are O-α-(D-galactopyranosyluronic acid)-(1→2)-L-rhamnopyranose, O-β-(D-glucopyranosyluronic acid)-(1→3)-O-α-(D-galactopyranosyluronic acid)-(1→2)-L-rhamnopyranose, and the hexasaccharide, the nonasaccharide, and the dodecasaccharide composed of a repeating unit having the structure of the trisaccharide through position 4 of the D-galacturonic acid residue. The polysaccharide was also subjected to chromium trioxide oxidation, and to controlled Smith degradation. The configuration and the mode of branching were determined. The structural features of the mucilage are discussed.
• Plant mucilages. XLII. An anti-complementary mucilage from the Leaves of Malva sylvestris var. mauritiana.
  作者：Masashi TOMODA、Ryoko GONDA、Noriko SHIMIZU、Haruki YAMADA

  DOI：10.1248/cpb.37.3029

  日期：——

  A mucilage, designated as MSL-M, was isolated from the leaves of Malva sylvestris L. var. mauritiana Mill. It was homogeneous on electrophoresis and gel chromatography. Its intrinsic viscosity value in aqueous solution was 12.0, and its molecular weight was estimated to be about 6.0 x 10(6). The major constituent is an acidic polysaccharide composed of L-rhamnose: D-galactose: D-galacturonic acid:

  从锦葵（Malva sylvestris L. var。）的叶子中分离出一种称为MSL-M的粘液。毛里塔尼亚米尔。在电泳和凝胶色谱上是均匀的。其在水溶液中的特性粘度值为12.0，并且其分子量估计为约6.0×10（6）。主要成分是由L-鼠李糖：D-半乳糖：D-半乳糖醛酸：D-葡萄糖醛酸组成的酸性多糖，其摩尔比为6：3：2：2。黏液和羧基还原衍生物的甲基化分析，碳13核磁共振和部分水解研究表明了其主要结构特征。它具有相当大的反补体活性。