1H‐NMR Fingerprinting of Vaccinium vitis‐idaea Flavonol Glycosides. Issue 5 (23rd May 2013)

• Record Type: Journal Article
• Authors: Riihinen, Kaisu R.; Mihaleva, Velitchka V.; Gödecke, Tanja; Soininen, Pasi; Laatikainen, Reino; Vervoort, Jacques M.; Lankin, David C.; Pauli, Guido F.; de, Victor; Comte, Gilles; Santos‐Buelga, Celestino
• Is Part Of: Phytochemical analysis. Volume 24:Issue 5(2013:Sep.)
• Page Start: 476
• Page End: 483
• Publication Date: 2013-05-23
• Subjects: Plants -- Analysis -- Periodicals; Plants -- chemistry -- Periodicals; 572.2
• DOI: 10.1002/pca.2444
• Languages: English
• ISSNs: 0958-0344

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <sec id="pca2444-sec-0001" sec-type="section"> <title>Introduction</title> <p>The fruits of <italic>Vaccinium vitis‐idaea L</italic>. are a valuable source of biologically active flavonoid derivatives. For studies focused on the purification of its quercetin glycosides (QGs) and related glycosides from plants and for the purpose of biological studies, the availability of numeric datasets from computer‐assisted <sup>1</sup>H iterative full spin analysis (HiFSA), that is, <sup>1</sup>H‐NMR fingerprinting, can replace and assist the repetitive and tedious two‐dimensional NMR identification protocol required for both known and new compounds, respectively.</p> </sec> <sec id="pca2444-sec-0002" sec-type="section"> <title>Objective</title> <p>To fully interpret the complex <sup>1</sup>H‐NMR fingerprints of eight QGs obtained from the berries of <italic>V. vitis‐idaea</italic> and provide complete and unambiguous signal assignments.</p> </sec> <sec id="pca2444-sec-0003" sec-type="section"> <title>Methods</title> <p> <italic>Vaccinium vitis‐idaea</italic> QGs were purified in a single run by long‐bed gel permeation chromatography and identified by comparison with commercially available compounds using LC–MS combining ion‐trap and time‐of‐flight detection and one‐ or two‐dimensional NMR. The HiFSA analysis yielded full sets of <sup>1</sup>H chemical shifts and proton–proton coupling constants, allowing for field‐independent spectral simulation.</p> </sec> <sec id="pca2444-sec-0004" sec-type="section"> <title>Results</title> <p>Signal assignments were achieved for the reference standards and the QGs that dominated in purified fractions. However, even mixtures of two to three QGs could be fitted using the HiFSA approach. In the case of the overlapped sugar resonances, the initial fitting of the <sup>1</sup>H spectra of reference compounds, together with values extracted from the two‐dimensional NMR data and literature data, assisted in the process.</p> </sec> <sec id="pca2444-sec-0005" sec-type="section"> <title>Conclusion</title> <p>The HiFSA method revealed for the first time the presence of Q‐3‐<italic>O</italic>‐β‐glucopyranoside and Q‐3‐<italic>O</italic>‐β‐glucuronopyranoside in the berries of <italic>V. vitis‐idaea</italic>, and unambiguously confirmed the structures of Q‐3‐<italic>O</italic>‐[4″‐(3‐hydroxy‐3‐methylglutaroyl)]‐α‐rhamnopyranoside, Q‐3‐<italic>O</italic>‐α‐rhamnopyranoside, Q‐3‐<italic>O</italic>‐β‐galactopyranoside, Q‐3‐<italic>O</italic>‐α‐arabinofuranoside, Q‐3‐<italic>O</italic>‐β‐xylopyranoside and Q‐3‐<italic>O</italic>‐α‐arabinopyranoside. Copyright © 2013 John Wiley & Sons, Ltd.</p> </sec> </abstract>