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• W2013549895 abstract "Mass spectrometric methodology based on the combined use of positive and negative electrospray ionization, collision-induced dissociation (CID) and tandem mass spectrometry (MS/MS) has been applied to the structural characterization of 6-hydroxyluteolin 7-O-glucoside and 7-O-glucosyl-(1 --> 3)-glucoside. In-source fragmentation of both glycosides at an increased potential yielded the protonated and deprotonated aglycone, allowing CID spectra to be obtained. The differentiation between quercetin and 6-hydroxyluteolin aglycones was achieved by product ion analysis of the protonated and deprotonated aglycone (m/z 303 and 301), that showed the characteristic product ions (1,3)A at m/z 151 and 153 for quercetin, and m/z 167 and 169 for 6-hydroxyluteolin, consistent with the trihydroxylated A-ring skeleton. In the negative ion mode both glycosides were shown to undergo collision-induced homolytic and heterolytic cleavages of the O-glycosidic bond producing the aglycone radical-anion [Y0-H]-* and Y0(-) product ions. At lower collision energy, various fragmentations involving the glucose moieties were observed with a relatively higher abundance for the monoglucoside compared to the diglucoside. In the latter case both the inner and the terminal glucose residues were involved in the fragmentations, giving useful information on the 1 --> 3 interglycosidic linkage. CID MS/MS analysis of the sodiated molecules gave complementary information for the structural characterization of the studied compounds. Fragmentation mechanisms are proposed for the observed product ions." @default.
• W2013549895 created "2016-06-24" @default.
• W2013549895 creator A5030497663 @default.
• W2013549895 creator A5042287608 @default.
• W2013549895 creator A5082850140 @default.
• W2013549895 date "2005-01-01" @default.
• W2013549895 modified "2023-10-10" @default.
• W2013549895 title "Application of positive and negative electrospray ionization, collision-induced dissociation and tandem mass spectrometry to a study of the fragmentation of 6-hydroxyluteolin 7-O-glucoside and 7-O-glucosyl-(1 → 3)-glucoside" @default.
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• W2013549895 doi "https://doi.org/10.1002/rcm.2122" @default.
• W2013549895 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16136518" @default.
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