Ginsenosides were separated using the Kinetex C18 column (2.6 μm, 100 × 2.1 mm; Phenomenex, Torrance, CA, USA) at 35 °C and two Rg3 stereoisomers, 20(S)-Rg3 and 20(R)-Rg3, were analysed using the ACQUITY UPLC BEH C18 column (1.7 μm, 2.1 × 100 mm; Waters, Milford, MA, ...