Table 1: Polyphenolic composition of the Batiki Tyrnavou grape pomace extract.

PolyphenolsRt (min)m/z [M±H]±

Flavan-3-ols
 Catechin3.83291.0863 [M+H]+
289.0707 [M−H]
 Epicatecin5.93291.0863 [M+H]+
289.0707 [M−H]
 Epicatechin-3-gallate9.25441.0816 [M−H]
Anthocyanidins
 Cyanidin9.25609.1467 [M−H]
 Malvidin11.74331.0812 [M+H]+
 Delphinidin13.55301.0359 [M−H]
 Petunidin15.99315.0516 [M−H]
Anthocyanins
 Myrtillin9.53463.0888 [M−H]
 Kuromanin10.63447.0939 [M−H]
 Oenin6.72491.1201 [M−H]
 Peonidin-3-O-glucoside5.76463.1235 [M+H]+
Phenolic acids
 Gallic acid0.78169.0147 [M−H]
 Caftaric acid26.18311.0398 [M−H]
Flavonols
 Quercetin9.56301.0357 [M−H]
 Kaempferol15.79285.0407 [M−H]

TPC (total polyphenol content)648 (mg gallic acid/g extract)