Medicine with dicaffeoylquinic acid from Artemisia selengensis for treating gout

Abstract

1,4-dicaffeoylquinic acid is used as a xanthine oxidase inhibitor and in preparation of a medicament for treating gout. The present invention is the first to isolate and identify five dicaffeoylquinic acid compounds from Artemisia selengensis leaves. The compound not only has an ability of inhibiting xanthine oxidase activity, but also has the function of anti-gout inflammation, which can be better used for treating gout. The dicaffeoylquinic acid is derived from natural plants and has the advantages of being safe and non-toxic, and having fewer side effects.

What is claimed is: 
     
         1 . A xanthine oxidase inhibitor, comprising an active ingredient of a dicaffeoylquinic acid. 
     
     
         2 . The xanthine oxidase inhibitor, as recited in  claim 1 , wherein the dicaffeoylquinic acid is 1,4-dicaffeoylquinic acid, 3,4-dicaffeoylquinic acid, 1,5-dicaffeoylquinic acid, 3,5-dicaffeoylquinic acid, or 4,5-dicaffeoylquinic acid. 
     
     
         3 . The xanthine oxidase inhibitor, as recited in  claim 1 , wherein the dicaffeoylquinic acid is extracted from Artemisia selengensis leaves.