Three new oleanene glycosides, sophoraflavosides II-IV (2-4) were isolated together with sophoraflavoside I (1) as the corresponding methyl ester forms from Sophorae Radix, the fresh roots of Sophora flavescens AITON (Leguminosae). Their structures have been elucidated as 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→2)-β-D-glucuronopyranosyl oxytrogenin 22-O-α-L-arabinopyranoside (3) and 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-galactopyranosyl-(1→2)-β-D-glucuronopyranosyl oxytrogenin 22-O-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranoside (4), along with unambiguous characterization as 3β, 22β, 24-trihydroxyolean-12-en-29-oic acid for their sapogenol, named oxytrogenin (5) on the bases of chemical reactions and spectral analyses.
从槐树(Sophora flavescens AITON)的新鲜根(豆科植物)中分离出三种新的齐墩果烷苷,槐
黄苷 II-IV(2-4),以及槐
黄苷 I(1)的相应甲基酯形式。根据
化学反应和光谱分析,它们的结构被确定为氧杂蔷薇苷 3-O-α-
L-鼠李糖吡喃糖基-(1→2)-β-
D-半乳糖吡喃糖基-(1→2)-β-
D-葡萄糖醛酸吡喃糖苷(2)、3-O-α-
L-鼠李糖吡喃糖基-(1→2)-β-
D-半乳糖吡喃糖基-(1→2)-β-
D-葡萄糖醛酸吡喃糖苷氧杂蔷薇苷 22-O-α-
L-阿拉伯糖吡喃糖苷(3)和 3-O-α-
L-鼠李糖吡喃糖基-(1→2)-β-
D-半乳糖吡喃糖基-(1→2)-β-
D-葡萄糖醛酸吡喃糖苷氧杂蔷薇苷 22-O-β