Gonthier M.P., Cheynier V., Donovan J.L., Manach C., Morand C., Mila I., Lapierre C., Remesy C., Scalbert A. (2003) Microbial aromatic acid metabolites formed in the gut account for a major fraction of the polyphenols excreted in urine of rats fed red wine polyphenols. J Nutr 133:461-7

Compound Mean content
(+)-Catechin 8.4 mg/g dry weight
(-)-Epicatechin 7 mg/g dry weight
Myricetin 3-O-glucoside 0.2 mg/g dry weight
Quercetin 3-O-glucoside 0.5 mg/g dry weight
Myricetin 1.3 mg/g dry weight
Quercetin 2.2 mg/g dry weight
Delphinidin 3-O-glucoside 1.5 mg/g dry weight
Cyanidin 3-O-glucoside 0.4 mg/g dry weight
Petunidin 3-O-glucoside 1.3 mg/g dry weight
Peonidin 3-O-glucoside 1.2 mg/g dry weight
Malvidin 3-O-glucoside 7.2 mg/g dry weight
Malvidin 3-O-(6''-p-coumaroyl-glucoside) 1.9 mg/g dry weight
Gallic acid 5.6 mg/g dry weight
Proanthocyanidins, total 146 mg/g dry weight
Polyphenols, total 299 mg/g dry weight