目的 研究红葱Eleutherine americana 的化学成分。方法 采用硅胶柱色谱、Sephadex LH-20柱色谱及重结晶等方法，分离纯化红葱的化学成分，通过MS、NMR等波谱技术确定化合物结构。结果 确定了7个化合物的结构，分别为9-hydroxy-8-methoxy-1-methyl-1, 3-dihydronaphtho [2, 3-c] furan-4-O-β-D-glucopyranoside（1）、eleutherinoside A（2）、豆甾醇- 3-O-β-D-葡萄糖苷（3）、kadsuric acid（4）、豆甾醇（5）、1, 2-二羟基-8-甲氧基-3-甲基蒽醌（6）、9-methoxy-1, 3-dimethyl-1H-naphtho [2, 3-c] pyran-5, 10-dione（7）。结论 化合物1为新化合物，命名为红葱新苷。化合物3～5为首次从该植物中分离得到，化合物6和7为首次获得的新天然产物。

Objective To investigate the chemical constituents from Eleutherine americana. Methods The chemical constituents were isolated and purified by column chromatography on silica gel, Sephadex LH-20, and recrystallization. Their structures were elucidated by means of MS and NMR. Results Seven compounds were isolated and identified as 9-hydroxy-8-methoxy-1-methyl-1, 3-dihydronaphtho [2, 3-c] furan-4-O-β-D-glucopyranoside (1), eleutherinoside A (2), stigmasterol-3-O-β-D-glucopyranoside (3), kadsuric acid (4), stigmasterol (5), 1, 2-dihydroxy-8-methoxy-3-methyl-anthra-9, 10-quinone (6), and 9-methoxy-1, 3-dimethyl-1H-naphtho [2, 3-c] pyran-5, 10-dione (7). Conclusion Compound 1 is a new glucopyranoside named eleuthamoside; compounds 3—5 are isolated from the plant for the first time, and compounds 6 and 7 are two new natural constituents.