Abstract
In the previous paper, it was reported that two crystalline compounds, tentatively named B1 and C1, were isolated from Sophora subprostrata in poor yield. In the present wark, two new crystalline compounds were obtained from the roots of Sophora japonica in good yields and named B2 and C2, respectively. The chemical structures of these four compounds were established as follows : B1 : l-Maackiain-mono-β-D-glucoside, C1 : l-pterocarpin, B2 : d-maackiain-mono-β-D-glucoside and C2 : dl-maackiain. B1 seems to be identical with trifolirhizin which was recently reported by J.B. Son Bredenberg et al. B2 is one of the diastereomers of trifolirhizin and so the name sophojaponicin was proposed.