Figure 1.
The MS spectra of compounds detected in ESA. (A) The MS spectrum of quinic acid; (B) The MS spectrum of malic acid; (C) The MS spectrum of gentisic acid; (D) The MS spectrum of procyanidin dimer; (E) The MS spectrum of procyanidin dimer; (F) The MS spectrum of catechin; (G) The MS spectrum of quercetin.