Flavonol glycosides of apricots prunus armeniaca and peaches prunus persica 13. phenolics of fruits
Henning, W.; Herrmann, K.
Zeitschrift fuer Lebensmittel-Untersuchung und -Forschung 171(3): 183-188
Leaves and fruits of 5 examinated varieties from apricots and peaches contained only kaempferol and quercetin glycosides. The total amount present on a fresh weight basis in apricots was 2900-3600 ppm in leaves and .apprx. 15 ppm in fully ripe fruits; in peaches, 7500-10,400 ppm were present in the leaves and up to 10 ppm in fruits in all cases on a fresh weight basis. The main glycoside in apricots was rutin, followed by kaempferol-3-rutinoside present at a considerably smaller concentration (less by a factor of 10). Small amounts of 3-glucosides and 3-galactosides of kaempferol and quercetin and quercetin-3-rhamnoside were detected, with considerable varietal variation in the amount present. Traces of more highly glycosidated flavonols were also detected. The main glycosides in peaches were 3-glucosides and 3-galactosides of kaempferol and quercetin. Further kaempferol-3-rutinoside and quercetin-3-rhamnoside are present and, only in the fruits, quercetin-3-rutinoside. Traces of 4 triglycosides, present in very small amounts, were incompletely identified as kaempferol-and quercetin-3-glucosyl-7-diglucoside and -3-galactosyl-7-diglucoside; traces of a quercetin-3-diglucoside were also found.