Triterpene glycosides from Astragalus and their genins. XC. Askendoside K from Astragalus taschkendicus
作者:I. M. Isaev、M. I. Isaev
DOI:10.1007/s10600-011-0002-6
日期:2011.9
A new triterpene cycloartane glycoside called askendoside K was isolated from roots of Astragalus taschkendicus Bunge (Leguminosae). The structure of this glycoside was established using chemical and biochemical transformations and spectral data. Askendoside K was a bisdesmoside of cycloorbigenin C and had the structure 23R,24R-cycloartan-3β,6α,16β,23,24,25-hexaol 3-O-[(α-L-arabinopyranosyl)(1 → 2)-β-D-xylopyranoside],23-O-[(β-D-glucuronopyranosyl)(1 → 2)-β-D-glucopyranoside].
从黄耆属植物Astragalus taschkendicus Bunge(豆科)的根部分离得到一种新的三萜环阿尔坦苷类化合物,命名为askendoside K。通过化学、生化转化及光谱数据确定了该苷的结构。Askendoside K是一种双去甲木脂素C型的苷,其结构为23R,24R-环阿尔坦-3β,6α,16β,23,24,25-六醇 3-O-[(α-L-阿拉伯糖吡喃糖基)(1→2)-β-D-木糖吡喃糖苷],23-O-[(β-D-葡萄糖醛酸吡喃糖基)(1→2)-β-D-葡萄糖吡喃糖苷]。