Patent ID: 11912716
Assignee: GUANGXI JIUFU BIOTECHNOLOGY CO., LTD
Field: Organic fine chemistry (Chemistry)
Classification: CPC A  C  Y | IPC A  C

Claim 5:
6. A method for preparing a compound having a formula:, comprising the following steps:
S1: sorting Limax, removing impurities, and pulverizing, to obtain Limax powder;
S2: heating reflux extraction the Limax powder with a solvent, filtering, leaving a filtrate and recovering the solvent from the filtrate under reduced pressure until the recovery is complete, to obtain a thick paste;
S3: adding the thick paste to a silica gel chromatography column, eluting with an elution solvent, collecting an eluate, and recovering the elution solvent from the eluate under reduced pressure, to obtain a thick substance; and
S4: adding a dissolution solvent to the thick substance, heating to dissolve completely, cooling, and freezing to precipitate white crystals, filtering, leaving a filtrate, recovering the dissolution solvent from the filtrate under reduced pressure, and re-standing to precipitate white needle-like crystals, filtering, and drying, to obtain the crystals, recrystallizing, and drying, to obtain the compound.