Two main constituents were purified from the precipitate by RP?HPLC. Compared with the UV?, LC?ESI?MS, HPLC and FTIR spectra of standard samples of arctiin and arctigenin, the two main purified constituents were identified as arctiin and arctigenin. ?

• 经紫外光谱(UV)、红外光谱(FTIR)及电喷雾质谱(ESI MS)检测,并与牛蒡子甙和牛蒡子甙元对照品的UV,LC ESI MS,HPLC及FTIR图谱比较,鉴定两个主要成分为牛蒡子甙和牛蒡子甙元。