目的研究浮萍Spirodela polyrrhiza(L.)Schleid.的化学成分。方法采用正相和反相硅胶柱色谱以及半制备型HPLC进行分离纯化,根据理化性质和波谱数据鉴定化合物的结构。结果分离得到了5个黄酮苷类化合物,分别鉴定为芹菜素8-C-(2″-O-阿魏酰基)-β-D-葡萄糖苷(apigenin-8-C-(2″-O-feruoyl-)-β-D-glucoside,1),荭草素(rietin,2),牡荆素(vitexin,3),木犀草素7-O-β-D-葡萄糖苷(luteolin7-O-β-D-glucoside,4),芹菜素7-O-β-D-葡萄糖苷(apigenin7-O-β-D-glucoside,5)。结论化合物1为一个新化合物,化合物2和3为首次自该植物中分离得到。 Objective To study the chemical constituents of duckweed Spirodela polyrrhiza (L.) Schleid. Methods The compounds were isolated and purified by normal phase and reverse phase silica gel column chromatography and semi-preparative HPLC. Their structures were identified by their physico-chemical properties and spectral data. Results Five flavonoid glycosides were isolated and identified as apigenin-8-C- (2 "-O-feruloyl) -β-D- (1), rietin (2), vitexin (3), luteolin7-O-β -D-glucoside, 4), apigenin7-O-β-D-glucoside (5). Conclusion Compound 1 is a new compound, and compounds 2 and 3 are isolated from this plant for the first time.