Betacyanins from bracts of Bougainvillea glabra.
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.
Heuer
S
S
Institut für Pharmazeutische Biologie, Technischen Universität Braunschweig, Germany.
Richter
S
S
Metzger
J W
JW
Wray
V
V
Nimtz
M
M
Strack
D
D
D050858:Betalains / Q000737:chemistry / Q000302:isolation & purification*; D002240:Carbohydrate Sequence; D002851:Chromatography, High Pressure Liquid; D004095:Dihydropyridines / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D044948:Flavonols; D008401:Gas Chromatography-Mass Spectrometry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification; D007211:Indoles / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry / Q000379:methods; D008969:Molecular Sequence Data; D010944:Plants / Q000737:chemistry*
D004095:Dihydropyridines; D005419:Flavonoids; D044948:Flavonols; D006027:Glycosides; D007211:Indoles; C555523:gomphrenin I; D050858:Betalains