萍蓬草和其它天然药物配伍用作滋补药和利尿药,也用来治疗出血,各种血瘀症和月经不调,尤其被用于分娩前后.作者取在日本采集的植物根茎4.3kg,用80%丙酮提取物经Sephadex LH-20柱层析,用不同浓度乙醇洗脱,得单、三、四、五取代的没食子酸类数个流分,各流分分别经Sephadex LH-20、MCI凝胶和CHP 20P大孔树脂柱层析,得化合物1(140mg),2(252mg),3(990mg),6(180mg) Pingtong grass and other natural medicines compatibility as tonic drugs and diuretics, but also for the treatment of bleeding, a variety of blood stasis and irregular menstruation, especially before and after childbirth.The author takes the plants collected in Japan rhizome 4.3kg, 80% acetone extract by Sephadex LH-20 column chromatography with different concentrations of ethanol elution, were single, three, four, five substituted gallic acid fractions, the fractions were Sephadex LH-20, MCI gel and CHP 20P macroporous resin column to afford Compound 1 (140 mg), 2 (252 mg), 3 (990 mg), 6 (180 mg)