从苦参(Sophora flavescens)的新鲜根中分离出3种新的齐墩果烯糖甙Sophoraflavoside Ⅱ～Ⅳ(2～4),同时还分离到sophoraflavoside甲酯。根据化学反应和光谱分析,确定它们的结构分别为Oxytrogenin 3-O-α-L-吡喃鼠李糖基-(1→2)-β-D-吡喃半乳糖基-(1→2)-β-D-吡喃葡萄糖醛酸糖甙(2),3-O-α-L-吡喃鼠李糖基-(1→2)-β-D-吡喃半乳糖基-(1 Three new types of oleanolic sugar, Sophoraflavoside II to IV (2-4), were isolated from fresh roots of Sophora flavescens, and sophoraflavoside methyl esters were also isolated. Based on the chemical reaction and spectral analysis, their structures were determined to be Oxytrogenin 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-galactopyranosyl-(1→2) -β-D-glucuronopyranoside (2), 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-galactopyranosyl-(1