Characterization of flavonols in cranberry (Vaccinium macrocarpon) powder

被引:149
|
作者
Vvedenskaya, IO
Rosen, RT
Guido, JE
Russell, DJ
Mills, KA
Vorsa, N
机构
[1] Rutgers State Univ, Philip E Marucci Ctr Blueberry & Cranberry Res &, Chatsworth, NJ 08019 USA
[2] Rutgers State Univ, Dept Plant Biol & Pathol, New Brunswick, NJ 08901 USA
[3] Rutgers State Univ, Ctr Adv Food Technol, New Brunswick, NJ 08901 USA
[4] Pfizer Corp, Kalamazoo, MI 49001 USA
关键词
Vaccinium macrocarpon Ait; cranberry; flavonol glycosides; quercetin; myricetin; arabinopyranoside; acylated quercetin-3-glycosides;
D O I
10.1021/jf034970s
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Flavonoids were extracted from cranberry powder with acetone and ethyl acetate and subsequently fractionated with Sephadex LH-20 column chromatography. The fraction eluted with a 60% methanol solution was composed primarily of phenolic constituents With maximum absorbance at 340 nm. A high-performance liquid chromatography procedure was developed, which resolved 22 distinct peaks with UV/vis and mass spectra corresponding to flavonol glycoside conjugates. Six new constituents not previously reported in cranberry or in cranberry products were determined through NMR spectroscopy to be myricetin-3-beta-xylopyranoside, quercetin-3-beta-glucoside, quercetin-3-alpha-arabino-pyranoside, 3'-methoxyquercetin-3-alpha-xylopyranoside, quercetin-3-O-(6"-p-coumaroyl)-beta-galactoside, and quercetin-3-O-(6"-benzoyl)-beta-galactoside. Quercetin-3-O-(6"-p-coumaroyl)-beta-galactoside and quercetin-3-O-(6"-benzoyl)-beta-galactoside represent a new class of cranberry flavonol compounds with three conjugated components consisting of a flavonol, sugar, and carboxylic acid (benzoic or hydroxycinnamic acids). This is also the first report identifying quercetin-3-arabinoside in both furanose and pyranose forms in cranberry. Elucidation of specific flavonol glycosides in cranberry is significant since the specificity of the sugar moiety may play a role in the bioavailability of the flavonol glycosides in vivo.
引用
收藏
页码:188 / 195
页数:8
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