Simultaneous determination of sixteen ginsenosides in Panax ginseng and its preparation by HPLC 20(S)-Ginsenoside-Rf2, a novel triterpenoid saponin from stems and leaves of Panax ginseng Studies on the Different Characteristic Ginsenoside in Ginseng (Panax ginseng) and American Ginseng (Panax quinquefolius) by TLC-scanning In vivo pharmacokinetic study on total saponins from roots of Panax ginseng in rats Chemical constituents from roots and rhizomes of Panax ginseng cultivated in Jilin province Determination of eight components in Qibai Pingfei Granule by quantitative analysis of multi-components with a single-marker