A high-purity compound was extracted by solvcnt extrac- tion, liquid-liquid separation, silica gel chromatography and high performance liquid semi preparative chromatography by using seeds of Camellia semiserrata Chi. as raw materials. The compound was i dentified as kaempferol-3 0 [α I. rhamnopyranosyl (1,3)-2,4-di-O- acetyl-α-L-rhamnopyranosyl ( 1,6)]-β-D-glucopyranoside, an acetyl flavonoid glycoside, by physical and chenlical properties, mass spec trometry and nuclear magnetic resonance. Two-dimensional nuclear magnelic resonance (2...