Unusual piscidic-acid and isoflavone derivatives from Sophora flavescens Ait. and their hepatoprotective effect.
Phytochemical investigation of the roots of Sophora flavescens afforded nineteen piscidic acid and isoflavone derivatives, including seven undescribed compounds (1-7) and four compounds (9-12) reported here for the first time as natural products. Comprehensive analysis of 1D and 2D NMR data, aided by GIAO NMR/DP4+ anal...