Study of three new p-coumaroyl glycoside flavonoids in some Italian red grape varieties

Luigi Bavaresco, M. De Rosso, A. Panighel, A. Dalla Vedova, M. Gardiman, R. Flamini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Main flavonols in grape are myricetin, quercetin and kaempferol present in glucoside and glucuronide forms [1]. Recently, also laricitrin, isorhamnetin and syringetin glucoside, galactoside and glucuronide were found [2]. In general, they are antioxidant compounds contained in dietary plants used for human nutrition [3]. A “suspect screening analysis” method by high-resolution mass spectrometry to study grape metabolomics was developed [4]. By this approach, three new p-coumaroyl flavonoids were putatively identified in Raboso Piave grape extract. Compounds were identified by overlapping various analytical methods according to recommendations in the MS-based metabolomics: accurate mass measurement provided the structural characterization of functional groups and literature data their probable position in the molecule. Compounds identified are a dihydrokaempferide-3-O-p-coumaroylhexoside-like flavanone, isorhamnetin-3-O-pcoumaroylglucoside, and a chrysoeriol-p-coumaroylhexoside-like flavone (Figure 1) [5]. In the present work, the study of these compounds was extended to other red grape varieties to evaluate their use as varietal markers. Correlation between p-coumaroyl derivatives and the anthocyanins was also studied to investigate the existence of possible common biosynthetic pathways.
Original languageEnglish
Title of host publication38th World Congress of Vine and Wine
Pages276-277
Number of pages2
Publication statusPublished - 2015
Event38th World Congress of Vine and Wine - Mainz am Rhein
Duration: 5 Jul 201510 Jul 2015

Conference

Conference38th World Congress of Vine and Wine
CityMainz am Rhein
Period5/7/1510/7/15

Keywords

  • LC/QTOF Mass Spectrometry
  • flavonols

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