Study of Grape Polyphenols by Liquid Chromatography-High-Resolution Mass Spectrometry (UHPLC/QTOF) and Suspect Screening Analysis

Figure 3

Principal grape anthocyanins. R: H, acetyl, p-coumaroyl, and caffeoyl; R₁: H, OH, and OCH₃; R₂: H, OH, and OCH₃; (1) pelargonidin-3-O-glucoside, (2) cyanidin-3-O-glucoside, (3) peonidin-3-O-glucoside, (4) delphinidin-3-O-glucoside, (5) petunidin-3-O-glucoside, (6) malvidin-3-O-glucoside, and (7) anthocyanidin-3,5-O-diglucoside.