期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1182, 期 1, 页码 56-64出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2007.12.070
关键词
O-glycosyl-C-glycosyl flavones; acylated derivatives; mass spectrometry; Hordeum vulgare
Thirty-seven flavonoids and a hydroxycynnamic acid have been characterized in barley leaves (Hordeum vulgare L.) by liquid chromatography-UV diode-array coupled to ion trap mass spectrometry with electrospray ionisation interface (negative mode). Their structures have been determined by the study of the ion mass fragmentation which characterizes C-glycosyl flavones and O-glycosyl-C-glycosyl flavones, and differentiates di-O-glycosyl flavones from O-diglycosyl-flavones. The majority of them are described for the first time in barley. Saponarin (isovitexin-7-O-glucoside), lutonarin (isoorientin-7-O-glucoside) and isoscoparin-7-O-glucoside derivatives constitute the major part of the detected compounds. Some acylated derivatives are also described, namely, 7-O-[6-acyl]-glucoside and -7-O-[6-acyl]-glc-4'-glucoside of isovitexin, isoorientin and isoscoparin. (C) 2007 Elsevier B.V. All rights reserved.
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