Chemical constituents in root bark of Changium smyrnioides Chemical constituents from Peucedanum decursivum Quantification of isopimpinellin in root of Toddalia Asiatica by HPLC Determination of osthole, imperatorin, and isopimpinellin in seeds of Cnidium monnieri by RP-HPLC Simultaneous determination of 5 active components in fructus cnidii by HPLC