Simultaneous determination of ten nucleosides and bases contents in plants of Paris L. by HPLC Simultaneous Determination of Six Flavonoid Compounds in Lotus Leaves by High Performance Liquid Chromatography Simultaneous determination of Gastrodin and eight nucleosides and nucleobases in Tibet cultured Gastrodia elata by HPLC method Simultaneous determination of thirteen components in Polygoni Multifori Caulis by UPLC-MS/MS