【摘要】 从日本续断根部的乙醇提取物中分得一个新的三萜皂苷．经过测定，它为：３Ｏ［βＤ吡喃葡萄糖（１ →４）］［αＬ吡喃鼠李糖（１ →３）］βＤ吡喃葡萄糖（１ →３）αＬ吡喃鼠李糖（１ →２）αＬ吡喃阿拉伯糖常春藤甙元．结果表明，采用一维ＳＥＭＤＹ 和旋转坐标ＮＯＥ 差谱核磁共振新技术相结合的方法测定这一类化合物的糖链结构不需要对化合物进行化学降解或衍生化，方法简便、快速，测定结果可靠，每个糖基的１Ｈ ＮＭＲ 信号可以分辨和明确归属．更多还原

【Abstract】 A new triterpenoid saponin was isolated from the ethanolic extract of the root of Dipsocus japonicus and its structure was established as 3 O \[β D glucopyrano syl(1→4)\]\[α L rhamnopyranosyl(1→3)\] β D glucopyranosyl(1→3) α L rhamnopyranosyl(1→2) α L arabinopyranosyl hederagenin. The results obtained showed that the chemical structure of oligosaccharide chain of the saponin could be elucidated by the combination of 1D SEMDY and NOE difference spectroscopy in rotating frame techniques, without having recourse to chemical degration or modification. Complete assignments of severely overlapping proton resonance of the sugar residues were obtained. \;更多还原