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. 2020 Sep 23;11:581470. doi: 10.3389/fphar.2020.581470

Table 2.

Polyphenolic compounds analyzed by the LC-MS method (II) in the lyophilized extracts.

Polyphenolic compounds MonitoredIon (m/z) Retention time (min) Concentrations (µg/g lyophilized extract)
TMW TMC
Catechin 289 6.0 ± 0.09 6.54 ± 0.02* 9.65 ± 0.04*
Syringic acid 197 8.4 ± 0.09 103.14 ± 0.19* 54.07 ± 0.09*
Protocatequic acid 153 2.8 ± 0.05 206.78 ± 0.41* 480.692 ± 0.83*
Vanilic acid 167 6.7 ± 0.07 270.65 ± 0.84* 67.27 ± 0.12*

Values represent the mean ± standard deviations (n = 3), *p < 0.001.