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- [11] Preparative isolation and purification of ginsenosides Rf, Re, Rd and Rb1 from the roots of Panax ginseng with a salt/containing solvent system and flow step-gradient by high performance counter-current chromatography coupled with an evaporative light scattering detector [J]. JOURNAL OF CHROMATOGRAPHY A, 2010, 1217 (13) : 1995 - 2001