Abstract
Betacyanins from the bracts of Bougainvillea glabra were isolated and characterized by a combination of spectroscopic techniques (DAD-HPLC, NMR, LC-MS, GC-MS, electrospray MS, tandem MS) as gomphrenin I (betanidin 6-O-beta-glucoside) and various derivatives of bougainvillein-v (betanidin 6-O-beta-sophoroside), i.e. mono- and diglucosylsophorosides which are acylated with 4-coumaric and caffeic acid (mono- and diesters). Besides the betacyanins, B. glabra bracts accumulated large amounts of flavonols (kaempferol and quercetin conjugates) reaching ratios of flavonol to betacyanin of 1:1.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Betalains / chemistry
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Betalains / isolation & purification*
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Carbohydrate Sequence
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Chromatography, High Pressure Liquid
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Dihydropyridines / chemistry
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Dihydropyridines / isolation & purification*
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Flavonoids / chemistry
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Flavonoids / isolation & purification
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Flavonols
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Gas Chromatography-Mass Spectrometry
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Glycosides / chemistry
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Glycosides / isolation & purification
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Indoles / chemistry
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Indoles / isolation & purification*
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Magnetic Resonance Spectroscopy
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Mass Spectrometry / methods
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Molecular Sequence Data
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Plants / chemistry*
Substances
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Dihydropyridines
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Flavonoids
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Flavonols
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Glycosides
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Indoles
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gomphrenin I
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Betalains