[Analysis of saponins in Panax notoginseng by UPLC-LTQ-Orbitrap MS/MS].

A method for qualitative analysis of constituents in Panax notoginseng by UPLC-LTQ-Orbitrap mass spectrometry was established.Based on the high-resolution mass information,MS/MS fragmentation behaviors and chemical components from literatures,43 compounds were identified or tentatively characterized.New type saponin aglycone,combined with malonyl-substituted and acetyl-substituted saponins were discovered and plausibly identified in this study.This work could be helpful for the quality control and further phyto-chemical studies of Panax notoginseng,and provided a good example for the analysis of chemical constituents in traditional Chinese medicine.