摘 要 ：从屏边三七（Panax stipuleanatus Tsai et Feng）根茎中分离到二个齐墩果烷型新皂甙，命名为屏边三七甙（stipuleanoside）R1和R2，其化学结构经光谱分析和化学降解反应，分别确定为齐墩果酸-3-0-β-D-葡萄吡喃糖基（1→3)（α-L-阿拉伯呋喃糖基（l→4）-β-D-葡萄吡喃糖醛酸甙（1）和齐墩果酸[28－O-β-D-葡萄吡喃糖基]－3－O-β-D-葡萄毗哺糖基（1→3）[α-L-阿拉伯呋喃糖基（1→4）]-β-D-葡萄吡喃糖醛酸甙（3）。
Abstract:The two new oleanolic acid-type saponins were isolated from the rhizomes of Panax stipuleanatus Tsai et Feng whose chemical structure were elucidated to be oleanolic acid- 3-O-β-D-glucopyranosyl (1→ 3 ) [α-L-ara- binofuranosyl (1→ 4 )]-β-D-glucuronopyranoside (1 ) and oleanolic acid-[28 -O-β-D-glucopyranosyl]- 3-O-β-D-glucopyranosyl (1→ 3 ) [α-L-arabinofu- ranosyl (1→ 4 )]-β-D-glucuronopyranoside (3 ) and were named stipuleano- side R1 and stipuleanoside R2, respectively.