Patent ID: 9072718
Filing Date: 2015-07-07
Classification: A61K,A61P,C07D

Abstract:
1. A method for producing a burdock fruit extract containing arctigenin and arctiin at a weight ratio of arctigenin/arctiin=0.7 to 1.3 from a burdock fruit which inherently comprises arctiin and beta-glucosidase, the method comprising the steps of: cutting a burdock fruit, adding water to said cut burdock fruit, and stirring said cut burdock fruit to a temperature of 20° C. to 50° C. to permit enzymatic conversion of arctiin into arctigenin by beta-glucosidase, to produce a burdock fruit extract, wherein the enzyme activity of said beta-glucosidase is 0.4 U or greater per 1 g of said burdock fruit, and further comprising an extraction step which comprises adding an organic solvent to said burdock fruit extract, wherein the burdock fruit is retained at a temperature of 80° C. or higher during said extraction step to yield the burdock fruit extract containing arctigenin and arctiin at a weight ratio of arctigenin/arctiin=0.7 to 1.3 from a burdock fruit which inherently comprises arctiin and beta-glucosidase.