Prenylflavanones isolated from Sophora flavescens

In the ongoing investigation of bioactive compounds from the roots of Sophora flavescens, six prenylflavanones, including two new ones, sophoraflavanones M (1) and N (2), were isolated. The structures of the new compounds were elucidated on the basis of their spectroscopic data. In addition, compound 5 exhibited moderate anti-influenza virus activity, with EC50 value of 43.9...