Identification of metabolites of Pulsatilla saponin D in intestinal microflora of rats in vitro by UPLC-Q-trap-MS Preparation and in vivo and in vitro evaluation of Pulsatilla Saponin D Solid Dispersions Study on in situ intestinal absorption of Pulsatilla saponin D in rats Simultaneous determination of eight saponins in alkali hydrolysate of total saponins from Pulsatilla chinensis by HPLC-ELSD