title: Analysis of saponins from leaves of Aralia elata by liquid chromatography and multi-stage tandem mass spectrometry.
abstract: Four saponins were isolated from the leaves of Aralia elata, and established using NMR and other spectroscopic methods, as well as data reported in the literature. Three Aralia saponins from the leaves of Aralia elata sharing the same structures as those isolated from the root bark suggested that the leaves would be a good substitute for the root bark of Aralia elata. These four Aralia saponins were then extensively investigated using complementarily positive and negative electrospray ionization multistage tandem mass spectrometry (ESI-MS(n)). Two isomers of saponins with different sugar linkages were then successfully differentiated by positive ESI-MS(n) and verified with different retention times and the collision-induced dissociation (CID) spectra by LC-MS. A simple and effective LC-MS method was thus developed for the rapid identification and screening of these saponins in plant extracts from leaves of Aralia elata.
authors.affiliation: Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. mingquag@usc.edu
authors.forename: Mingquan
authors.initials: M
authors.lastname: Guo
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Liu
mesh_terms: D027983:Aralia / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry*; D012503:Saponins / Q000032:analysis* / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013237:Stereoisomerism; D053719:Tandem Mass Spectrometry
chemical_list: D012503:Saponins