Table 1.

Main representative groups of polyphenols present in red wine [67,68,69,77,94,95,96].

Group	Subclass	Main Representatives	Range in mg/L	Characteristic Structure
Non-flavonoid
	Hydroxybenzoic acids	Gallic, ellagic, parahydroxybenzoic, protocatechuic, vanillicand syringic acids	0–218.0	Gallic acid
	Hydroxycinnamic acids	Coutaric, caftaric, and fertaric acids	60.0–334.0	Caffeic acid
	Stilbenes	Resveratrol	0.1–7.0	Resveratrol
Flavonoids
	Flavones	Luteolin	0.2–1.0	Luteolin
	Flavan-3-ols	Catechin and epicatechin	50.0–120.0	Catechin
	Flavonols	Myricetin, quercetin, kaempferol, and rutin	12.7–130.0	Quercetin
	Anthocyanins	Malvidin, cyanidin, peonidin, delphinidin, pelargonidin, petunidin	90.0–400.0	Malvidin