Abstract
The structure of a new 3-arylcoumarin, glycyrin (I), isolated from the root of Glycyrrhiza spp. (Seihoku Kanzo) (Leguminosae) has been determined as 2', 4'-dihydroxy-5, 7-dimethoxy-6-γ, γ-dimethylallyl-3-arylcoumarin on the basis of spectroscopic and chemical studies.