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

Figure 5

Principal stilbenes identified in vine tissues. (1) E- and Z-astringin, (2) E- and Z-piceid, (3) piceatannol, (4) pallidol, (5) pallidol-3-O-glucoside, (6) parthenocissin A, (7) trans-resveratrol, (8) hopeaphenol, (9) ampelopsin H, (10)α-viniferin, (11) vaticanol C isomer, (12) caraphenol B, (13) E- and Z-ε-viniferin, (14) E- and Z-miyabenol C, (15) E- and Z-δ-viniferin, and (16) trans-resveratrol-4′-methyl ether.