Figure 5

Q-TOF UPLC/MS spectra in negative ion mode and chemical structures of procaynidin B1 (A), (-)-epicatechin (B), and procyanidin B2 (C).
Q-TOF UPLC/MS spectra in negative ion mode and chemical structures of procaynidin B1 (A), (-)-epicatechin (B), and procyanidin B2 (C).