In this study, phenolic compounds of hazelnut leaves of 10 different cultivars with the same cultural,
geographical, geological and climatic conditions were analyzed by HPLC/DAD and HPLC/DAD/MS/MS –
ESI. Eight phenolic compounds (3-caffeoylquinic acid, 5-caffeoylquinic acid, caffeoyltartaric acid,
p-coumaroyltartaric acid, myricetin 3-rhamnoside, quercetin 3-glycoside, quercetin 3-rhamnoside and kaempferol
3-rhamnoside) were identified and quantified. All of the analyzed samples showed a similar phenolic
profile, in which myricetin 3-rhamnoside and quercetin 3-rhamnoside were the major compounds and
caffeoyltartaric and p-coumaroyltartaric acids were present in vestigial amounts.
