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Rapid Determination of Major Compounds in the Ethanol Extract of Geopropolis from Malaysian Stingless Bees, Heterotrigona itama, by UHPLC-Q-TOF/MS and NMR

文献类型：外文期刊

第一作者： Zhao, Lingling

作者： Zhao, Lingling;Yu, Mengjiao;Sun, Minghui;Xue, Xiaofeng;Sun, Liping;Zhao, Lingling;Cao, Wei;Wang, Tongtong

作者机构：

关键词： geopropolis;UHPLC-Q-TOF/MS;stingless bees;Heterotrigona itama

期刊名称：MOLECULES （影响因子：4.411；五年影响因子：4.587 ）

ISSN： 1420-3049

年卷期： 2017 年 22 卷 11 期

页码：

收录情况： SCI

摘要： A reliable, rapid analytical method was established for the characterization of constituents of the ethanol extract of geopropolis (EEGP) produced by Malaysian stingless beesHeterotrigona itamaby combining ultra-high-performance liquid chromatography with quadruple time-of-flight mass spectrometry (UHPLC-Q-TOF/MS). Based on known standards, the online METLIN database, and published literature, 28 compounds were confirmed. Phenolic acids, flavones, triterpenes and phytosterol were identified or tentatively identified using characteristic diagnostic fragment ions. The results indicated that terpenoids were the main components of EEGP, accompanied by low levels of phenolic acids, flavonoids, and phytosterol. Two major components were further purified by preparative high-performance liquid chromatography (PHPLC) and identified by nuclear magnetic resonance (NMR) as 24(E)-cycloart-24-ene-26-ol-3-one and 20-hydroxy-24-dammaren-3-one. These two triterpenes, confirmed in this geopropolis for the first time, are potential chemical markers for the identification of geopropolis from Malaysian stingless bees, H. itama.

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