Patent ID: 7932057

Claim:
A method for preparing 20-O-β-D-glucopyranosyl-20(S)-protopanaxadiol, comprising the steps of: (a) providing powder of Sanqi leaves and stems; (b) providing a fungus for fermenting the Sanqi leaves and stems; (c) fermenting the Sanqi leaves and stems with the fungus to yield fermentation products wherein the fermentation temperature is 20-50° C., the fermentation humidity is 70-100%, the pH value is 4.0-6.0, the fermentation period is 5-15 days, and the fungus is Aspergillus niger, strain SP-LSL-001-deposited as Accession No. BCRC 930079; (d) extracting and collecting the fermentation products; and (e) isolating 20-O-β-D-glucopyranosyl-20(S)-protopanaxadiol from the fermentation products.