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J Agric Food Chem. 2002 Jul 31;50(16):4615-8.

Phenolic profile of quince fruit (Cydonia oblonga Miller) (pulp and peel).

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Serviço de Farmacognosia, Faculdade de Farmácia, Chemistry Center of Oporto University (CEQUP), Universidade do Porto, R. Aníbal Cunha, 164, 4050-047 Porto, Portugal.


Qualitative and quantitative analyses of phenolic compounds were carried out on quince fruit samples from seven different geographical origins in Portugal. For each origin, both pulp and peel were analyzed by reversed-phase HPLC-DAD and HPLC-DAD/MS. The results revealed differences between the phenolic profiles of pulps and peels in all studied cases. The pulps contained mainly caffeoylquinic acids (3-, 4-, and 5-O-caffeoylquinic acids and 3,5-dicaffeoylquinic acid) and one quercetin glycoside, rutin (in low amount). The peels presented the same caffeoylquinic acids and several flavonol glycosides: quercetin 3-galactoside, kaempferol 3-glucoside, kaempferol 3-rutinoside, and several unidentified compounds (probably kaempferol glycoside and quercetin and kaempferol glycosides acylated with p-coumaric acid). The highest content of phenolics was found in peels.

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