Qualitative and quantitative analysis of major constituents of Paeoniae Radix Alba and Paeoniae Radix Rubra by HPLC-DAD-Q-TOF-MS/MS Identification of chemical constituents in Ophiocordyceps xuefengensis sp. nov.by HPLC-Q-TOF-MS/MS Metabolism of six saponins by rat intestinal bacteria in vitro Development of UPLC-Q-TOF-MS/MS combined with reference herb approach to rapidly screen commercial sulfur-fumigated ginseng Rapid identification of chemical components in Congrong Zonggan capsule by UPLC-Q-TOF-MS/MS