A METHOD OF ISOLATING QUERCETIN-3-O-α-RHAMNOSIDE AND KAEMPFEROL-3-O-α-RHAMNOSIDE FROM LINDERA OBTUSILOBA BLUME AND A USE OF THE COMPOUND AS AN ANTIOXIDANT OR LIVER PROTECTION

摘要

PURPOSE: A method for isolating quercetin-3-O-alpha-rhamnoside and campherol-3-O-alpha-rhamnoside from ginger is provided to ensure antioxidation and liver protection without side effects and toxicity. CONSTITUTION: A method for extracting and isolating quercetin-3-O-alpha-rhamnoside or campherol-3-O-alpha-rhamnoside comprises: a step of preparing crude extract from Lindera obtusiloba Blume using water or alcohol; a step of treating hexane to obtain aqueous layer; and a step of treating ethyl acetate to obtain ethyl acetate layer. The alcohol is methanol, ethanol, propanol, or butanol. An antioxidtion composition contains quercetin-3-O-alpha-rhamnoside or campherol-3-O-alpha-rhamnoside as an active ingredient.