Abstract: A new glycoside, named dregeoside, was isolated from the rhizome of Dregea sinensis var. corrugata (Asclepiadaceae). The structure of dregeoside A was deduced on the basis of chemical and spectral evidence as drevogenin A 3 -0-3-0 -methyl- 6 -deoxy- β-D－allopyranosyl－（1→4）-β-D－oleandropyranosyl-（1→4）- β-D－cymaropyranosyl- （1→4）-β-D－cymaropyranoside）．

Key words: Dregea sinensis var. corrugata

摘要： 从苦绳（Dregea sinensis var. corrugata）的根茎中分得一个新的C21-甾体甙成分，命名为苦绳甙甲（dregeoside A）。经光谱分析和化学反应证明，其结构为：苦绳甙元甲 3－O－3－O-甲基-6-去氧-β-D-阿洛吡喃糖（1→4）-β-D-夹竹桃吡喃糖（1→4）- β-D-磁麻吡喃糖1→4）-β-D-磁麻吡喃糖甙（drevogenin A 3－O－3－O－methyl－6－deoxy - β-D－allopyranosyl－（1→4）-β-D－oleandropyranosyl-（1→4）- β-D－cymaropyranosyl- （1→4）-β-D－cymaropyranoside）．

关键词: 苦绳, 苦绳甙, 3－O-甲基-6-去氧阿洛糖, 夹竹桃糖, 磁麻糖