The invention discloses a simple production method of rare
ginsenoside IH-901. The method comprises the following steps: evenly mixing 1
unit mass of a
ginsenoside Rb1
monomer, 0.1-0.3
unit mass of domestic crude
snail enzyme and 1
unit volume of
phosphoric acid-
citric acid buffer solution with the pH value of 3-5, performing heat preservation at the temperature of 35-50 DEG C for 10-20 hours, and then terminating the reaction; adding 0.5
unit mass of
ethanol into the
mixed solution for extraction, centrifugally collecting an
ethanol layer, and then decompressing and concentrating to obtain a sample; placing the sample on the silicagel column, taking a lower CHCl3-AcOEt-MeOH-H2O layer as an eluent for eluting 0.8 unit
mass of the sample, collecting the obtained
elution solution, and then decompressing and concentrating to obtain a condensed extract; and dissolving the condensed extract in a
mixed solution of
ethanol and water at a volume ratio of 100:70, and staying overnight at
room temperature so as to finally obtain IH-901
crystal with the purity more than 95%. In the method, as the
ginsenoside Rb1
monomer is taken as a reaction substrate and the cheap domestic crude
snail enzyme is taken as the reaction
enzyme, the separation and purification process of the product is very simple; and in addition, by utilizing the single substrate and the cheap domestic crude
snail enzyme, the simple production method has the advantages of rich enzyme source, low
raw material cost, simple product extraction process and the like.