1→4)-2-O-acetyl-α-l-arabinopyranosyl)] with three different steroidal sapogenins at 16β-hydroxy. Their conformation was analyzed with NMR spectroscopy and molecule simulation. The arabinose moiety of 1–3 linked analogues was in chair conformation and 1–4 linked analogues was in boat conformation. 1–3 linked analogues exhibited potent anti-proliferation activity against a panel of human tumor cells
通过偶联二糖(2 - O -
4-甲氧基苯甲酰基-β - d-
吡喃并
吡喃糖基- (1→3)-2 - O-
乙酰基-α - 1-阿拉伯
吡喃糖基)或(2- O -4-(E)-肉桂酰基-β- d-
吡喃并
吡喃糖基- (1→3)-2 - O-
乙酰基-α - 1-阿拉伯
吡喃糖基)和它们的1→4连接的类似物[(2- O -
4-甲氧基苯甲酰基-β- d-
吡喃喃糖基- (1→4)-2 - O-
乙酰基-α - 1-阿拉伯
吡喃糖基)或(2- O -4-(E)-肉桂酰基-β- d-
吡喃
木糖基- (1→4) -2- O-
乙酰基-α- 1-阿拉伯
吡喃糖基]],在16β-羟基上具有三种不同的甾体
皂苷元。用NMR光谱和分子模拟分析了它们的构象。1–3个连接类似物的
阿拉伯糖部分呈椅子构型,而1–4个连接类似物呈船形。1-3个连接的类似物在纳摩尔浓度
水平下对一组人类肿瘤细胞表现出有效的抗增殖活性,而1-4个连接的类似物则没有抗肿