Stilbene Oligomers in Roots of Sophora davidii.

Abstract Three stilbene oligomers, davidiols A–C were isolated from the roots of Sophora davidii in addition to the seven known phenols, leachianone A, sophoraflavanones G, H and I, miyabenol C, α-viniferin and e-viniferin. Their structures and relative configurations were established by means of 2D-NMR spectroscopy including COLOC and PSNOESY.