Characterization of phenolic profile in dried grape skin of Vitis vinifera L. cv. Pinot Blanc with UHPLC-MS/MS and its development during ripening was written by Serni, E.;Tomada, S.;Haas, F.;Robatscher, P.. And the article was included in Journal of Food Composition and Analysis in 2022.COA of Formula: C30H26O12 The following contents are mentioned in the article:
Comprehensive phenolic composition of dried grape skin from cv. Pinot Blanc and its development during ripening is reported, with particular emphasis on flavonol glycosides profile. Extraction procedure and reversed-phase ultra-high-performance liquid chromatog.-triple quadrupole mass spectrometry (UHPLC-QqQ-MS/MS) method were optimized and validated for the determination of 39 phenolic compounds belonging to different groups (flavonols, dihydroflavonols, benzoic and hydroxycinnamic acids, flavan-3-ols). Beside selected reaction monitoring (SRM) for analytes available as standards, flavonols and dihydroflavonols profile was furtherly explored performing precursor ion scan (PIS) with neutral loss (NL) for unavailable compounds Quercetin-3-O-rutinoside occurred as major flavonol component, and rutinosides for kaempferol- and isorhamnetin- structures were also quantitable. Presence of different myricetin derivatives was unveiled, with myricetin-3-O-glucoside being quantifiable at all ripening time points. Besides high levels of astilbin, dihydroquercetins profile resulted highly complex. Moreover, ratio between caftaric and coutaric acid and between isomers of coutaric acid at harvest was uncommon if compared to other white cultivars. This study involved multiple reactions and reactants, such as (2R,2’R,3R,3’R,4R)-2,2′-Bis(3,4-dihydroxyphenyl)-[4,8′-bichromane]-3,3′,5,5′,7,7′-hexaol (cas: 29106-49-8COA of Formula: C30H26O12).
(2R,2’R,3R,3’R,4R)-2,2′-Bis(3,4-dihydroxyphenyl)-[4,8′-bichromane]-3,3′,5,5′,7,7′-hexaol (cas: 29106-49-8) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.COA of Formula: C30H26O12
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