7-O-Methylglabranin, 6-C-prenylpinocembrin, glabranin, pinocembrin, galangi
n, and a novel isoflavonoid, (E)-5,7,4'-trihydroxy-6-(3-hydroxymethyl-2-but
enyl)isoflavone (glabrisoflavone) were isolated from the aerial parts of Gl
ycyrrhiza glabra L. The structure of the novel isoflavonoid was elucidated
on the basis of chemical transformations and spectral data.