The invention discloses a method for preparing 3-acetyl
ginsenoside F1. The method comprises the following steps: 1, taking
ginseng flower buds, crushing the
ginseng flower buds, performing hot refluxing extraction by using 95%
ethanol, and concentrating the obtained solution to form a paste which is total extract; 2, dissolving the total extract in 25%
ethanol to adjust the concentration to 0.2 gcrude
drug / mL, filtering the obtained solution, adding 0.8 BV of the filtered solution into an LX-68
macro-porous adsorption resin column with a column
bed having a
diameter-to-length ratio of 1:9, removing impurities by using 3 BV of 40%
ethanol, then performing
elution with 9 BV of 75% ethanol, collecting 8-9 BV of 75% ethanol eluate, performing reduced pressure concentration until no
alcohol smell appears, and lyophilizing the obtained concentrate to obtain a crude lyophilized
powder; and 3, performing high-speed countercurrent separation with the
solvent system being n-
butanol /
ethyl acetate /
methanol / water /
chloroform having a volume ratio of 1:18:1:18:0.5, collecting an
elution fraction corresponding to the 3-acetyl
ginsenoside F1 according to obtained chromatogram, and concentrating the
elution fraction until the elution fraction is dry in order to obtain the 3-acetyl
ginsenoside F1.