Determination of Bakuchiol in the Frult of Psoralea corylia L. Comparison of Ancient and Modern Processing Methods for Fructus Psoraleae Optimization of processing technology for Psoraleae Fructus by D-optimal response surface methodology with UHPLC Toxicokinetics of bakuchiol,hepatic and renal toxicity in rats after single oral administration of Psoraleae Fructus and combination with Glycyrrhizae Radix et Rhizoma