Studies on the Constituents of Sophora Species. XXII. : Constituents of the Root of Sophora moorcroftiang BENTH. ex BAKER. (1)

Abstract

A new flavanone, named sophoraflavanone G (I), mp 173-175°C, C₂₅H₂₈O₆, and a new isoflavone, named sophoraisoflavone A (II), mp 235-237°C, C₂₀H₁₆O₆, were isolated from the root of Sophora moorcroftiana BENTH. ex BAKER (Leguminosae), together with sophoraflavanone B, licoisoflavone B, calycosin, l-maackiain and medicagol. The structures of I and II were established to be (2S)-5, 7, 2', 4'-tetrahydroxy-8-lavandulylflavanone and 3-(5'-hydroxy-2', 2'-dimethyl-2H-benzopyran-8'-yl)-5, 7-dihydroxychromone, respectively, on the basis of chemical and spectral evidence. The revision of the structures of nor-kurarinone and vexibinol is also described.