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Isolation, analysis and structures of phototoxic fagopyrins from buckwheatTavčar, Eva ...Buckwheat products are commonly used in health foods and food supplements. However, public awareness regarding the presence of photodynamic naphthodianthrones fagopyrins that can cause ... photosensitization is low. At least two additional compounds with structures similar to that of fagopyrin are known to exist; however, the structures of these compounds have never been determined. In this work, we improved the extraction procedure and the chromatographic analysis of fagopyrins by developing a simple, sensitive and high-resolution high performance liquid chromatography (HPLC) analytical method using fluorescence detection. We observed at least six fagopyrin derivatives, which were isolated and characterized via UV-Vis absorption, NMR spectroscopy and mass spectrometry. We determined the structures of two new derivatives (fagopyrin A and fagopyrin E) and proved the existence of proto fagopyrins that can transform into fagopyrins upon light exposure. Our methods complement the existing knowledge regarding fagopyrins and will allow for their further analysis, isolation and investigation of their biological activity.Source: Food chemistry. - ISSN 0308-8146 (Vol. 143, Jan. 2014, str. 432-439)Type of material - article, component part ; adult, seriousPublish date - 2014Language - englishCOBISS.SI-ID - 3557745
Author
Tavčar, Eva |
Žigon, Dušan |
Friedrich, Miha |
Plavec, Janez |
Kreft, Samo
Topics
ajda |
analiza ajde |
fotodinamika |
derivati fagopirina |
Fagopyrum sp. |
fluoerscenca |
fagopyrin derivatives |
photodynamic |
naphthodianthrone |
buckwheat analysis |
Fagopyrum sp. |
fluorescence
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Tavčar, Eva | 33335 |
Žigon, Dušan | 03950 |
Friedrich, Miha | 32912 |
Plavec, Janez | 10082 |
Kreft, Samo | 15460 |
Source: Personal bibliographies
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