[Studies on the chemical constituents of Lithocarpus polystachyus].

To study the chemical constituents from Lithocarpus polystachyus.Compounds were isolated and purified with silica gel, and there structures were identified by chemical property and spectral data.Nine compounds were isolated as phloridzin (I), phloretin (II), dihydrochalcone-2'-beta-D-glucopyranoside (III), daucossterol (IV), beta-sitosterol (V), quercetin (VI), luteolin (VII), quercitrin (VI), oleanolic acid (IX).Compounds II, IV - IX are isolated from this plant for the first time.