发酵产物经大孔吸附树脂、硅胶柱层析及重结晶等方法制备出牛蒡子苷元纯品，并采用核磁共振（NMR）、红外（IR）、质谱（MS）等方法对产物进行了鉴定。
The product of fermentation was separated with macroporous resins, and then purified by the silica-gel column chromatography and recrystallization. The pure product was assayed by NMR, IR and MS.
发酵产物经大孔吸附树脂、硅胶柱层析及重结晶等方法制备出牛蒡子苷元纯品，并采用核磁共振（NMR）、红外（IR）、质谱（MS）等方法对产物进行了鉴定。
The product of fermentation was separated with macroporous resins, and then purified by the silica-gel column chromatography and recrystallization. The pure product was assayed by NMR, IR and MS.
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