title: Profiling the phenolic compounds of Artemisia pectinata by HPLC-PAD-MSn.
abstract: An HPLC-PAD-MS(n) method was employed to profile the phenolic compounds of the aerial part of Artemisia pectinata (Neopallasia pectinata), a plant with no previous reports concerning its phenolic constituents. Three isomers of trans-caffeoylquinic acid accompanied by cis-5-caffeoylquinic acid, six isomers of trans-dicaffeoylquinic acid, two isomers of methyl trans-dicaffeoylquinate (including one new isomer), a trans-caffeoylferuloylquinic acid and three flavanoids were identified unambiguously by analysis of their UV and MS(n) spectra in comparison with standard compounds that were isolated from natural sources, or synthesised, or were surrogate standards (green coffee extract). Other compounds were identified by analysis of their UV and MSn data in comparison with those reported in the literature. MS(n) experiments also suggested the presence of groups of dicaffeoylquinic acid glycosides, caffeoylquinic acid diglycosides, caffeoylquinic acid glycosides and quinic acid diglycosides.
authors.affiliation: Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. ma@inm.u-toyama.ac.jp
authors.forename: Chao-Mei
authors.initials: CM
authors.lastname: Ma
authors.forename: Masao
authors.initials: M
authors.lastname: Hattori
authors.forename: Hu-Biao
authors.initials: HB
authors.lastname: Chen
authors.forename: Shao-Qing
authors.initials: SQ
authors.lastname: Cai
authors.forename: Mohsen
authors.initials: M
authors.lastname: Daneshtalab
mesh_terms: D019306:Artemisia / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D010636:Phenols / Q000032:analysis*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010636:Phenols