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题名: Structural characterization of iridoid glucosides by ultra-performance liquid chromatography/electrospray ionization quadrupole time-of-flight tandem mass spectrometry
作者: Li, Cun-man1;  Zhang, Xiu-li1;  Xue, Xing-ya1;  Zhang, Fei-fang1;  Xu, Qing1;  Liang, Xin-miao1
通讯作者: 梁鑫淼
刊名: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
发表日期: 2008-06-01
DOI: 10.1002/rcm.3579
卷: 22, 期:12, 页:1941-1954
收录类别: SCI
文章类型: Article
部门归属: 18
项目归属: 1803
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Analytical ;  Spectroscopy
研究领域[WOS]: Chemistry ;  Spectroscopy
英文摘要: The mass spectral fragmentation behavior of ten iridoid glucosides (IGs) has been studied using electrospray ionization (ESI), collision-induced dissociation (CID), and quadrupole time-of-flight tandem mass spectrometry (Q-TOF MS/MS). In the negative ESI mass spectra, the deprotonated [M-H](-) ion was observed for all of the ten IGs except gardoside methyl ester, while the formate adduct [M+HCOO](-) ion appeared to be favored by the presence of a methyl ester or a lactone group in the C-4 position when formic acid was added to the mobile phase. The CID MS/MS spectra of the [M-H](-) ions have been used for structural elucidation. Ring cleavages of the aglycone moiety have been observed in the MS/MS spectra, corresponding to F-1,4(-), F-2,6(-), F-2,7(-), and F-2,7(0)- ions, based on accurate mass measurements and the elemental compositions of the product ions. These characteristic ions gave valuable information on the basic structural skeletons. Furthermore, on the basis of the relative abundances of the fragment ions (1,4)F(-)and F-2,7(-), different sub-classes, such as cyclopentarte-type and 7,8-cyclopentene-type IGs, can be differentiated. Ring cleavage of the sugar moieties was also observed, yielding useful information for their characterization. In addition, the neutral losses, such as H2O, CO2, CH3OH, CH3COOH, and glucosidic units, have proved useful for confirming the presence of functional substituents in the structures of the IGs. Based on the fragmentation patterns of these standard IGs, twelve IGs have been characterized in an extract of Hedyotis diffusa Willd. by means of ultra-performance liquid chromatography/Q-TOF MS/MS, of which six have been unambiguously identified and the other six have been tentatively identified. Copyright (C) 2008 John Wiley & Sons, Ltd.
关键词[WOS]: COLLISION-INDUCED DISSOCIATION ;  ELECTROSPRAY-IONIZATION ;  PHENYLETHANOID GLYCOSIDES ;  MONOTERPENE GLUCOSIDES ;  METAL CATIONIZATION ;  PAEDERIA-SCANDENS ;  FRAGMENTATION ;  CONSTITUENTS ;  DIFFUSA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000256985100021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100683
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Li, Cun-man,Zhang, Xiu-li,Xue, Xing-ya,et al. Structural characterization of iridoid glucosides by ultra-performance liquid chromatography/electrospray ionization quadrupole time-of-flight tandem mass spectrometry[J]. RAPID COMMUNICATIONS IN MASS SPECTROMETRY,2008,22(12):1941-1954.
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