Plant drug for treatment of liver disease

A process for producing schisandrin from fruit of Schisandra chinensis (Turcz) Baill comprising:

• a. extracting the dried powder of the fruit of Schisandra chinensis with boiling water;
• b. filtering the extract of water and obtaining filter residue;
• c. extracting said filter residue with 80% ethanol;
• d. obtaining a residue from the 80% ethanol extract by recovering said ethanol under reduced pressure;
• e. extracting said residue from step d with 80% ethanol-gasoline (1:1);
• f. obtaining a layer of ethanol;
• g. concentrating the ethanol layer;
• h. obtaining a crude crystal under reduced pressure from the concentrated ethanol layer;
• i. dissolving the crude crystal in benzene;
• j. filtering the benzene;
• k. obtaining a residue of benzene by recovering said benzene;
• l. dissolving the residue of benzene in ethanol to obtain a solution of crystalloid material;
• m. drying the solution of crystalloid material to obtain a dried powder;
• n. passing the dried powder through a column packed with A1203 and eluting the column using petroleum ether-benzene (1:1) to obtain an elutant;
• o. concentrating said elutant under-reduced pressure to obtain crystals;
• p. recrystallizing the crystals to produces Schisandrin in a crystalline form.