Patent ID: 9586921
Date: 2017-03-07
CPC Classifications: A61K,A61P,C07D

Claim:
1. A method for producing an extract from burdock fruit, said extract containing arctigenin at a high content of more than 3% of arctigenin, comprising the steps of: a) cutting a burdock fruit; b) adding water to said burdock fruit; c) agitating said burdock fruit in water at a temperature of 20-60° C., thereby converting arctiin in said burdock fruit into arctigenin by enzymatic conversion using beta-glucosidase, wherein said beta-glucosidase consists of endogenous beta-glucosidase that is inherently present in said burdock fruit used in herbal medicine; d) adding ethanol to the burdock fruit in water after the agitating step c) to form a solution comprising a burdock fruit extract; e) obtaining the burdock fruit extract from the solution; and f) concentrating and freeze-drying or spray drying the burdock fruit extract after the obtaining step e) to produce an extract from burdock fruit containing arctigenin at a high content of more than 3% of arctigenin.