Structural determination of C-glycosylflavones by mass spectrometry of their permethyl ethers: O-glycosyl-6-C-glycosylflavones |
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| Authors: | Marie-Louise Bouillant André Besset Jean Favre-Bonvin Jean Chopin |
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| Institution: | 1. Laboratoires de Chimie biologique, Université Claude Bernard, Lyon I, 69621 Villeurbanne, France;2. Phytochimie, Université Claude Bernard, Lyon I, 69621 Villeurbanne, France |
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| Abstract: | Permethylated O-glycosyl-C-glycosylflavones give well defined MS including an important molecular peak. Permethyl 6-C-glycosylflavones O-glycosylated on a phenolic hydroxyl group are easily distinguished from the isomeric permethyl 6-C-diholosylflavones. In both types, the position of the O-glycosidic bond can be deduced from the MS, eventually after acid hydrolysis. 2″-O-glycosyl-6-C-glycosylflavones can be differentiated from their 8-C isomers. |
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| Keywords: | MS MS fragmentation permethylation |
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