IDENTIFICATION OF SOME PHENOLICS IN PEAR FRUIT

Four hydroxycinnamic acid esters and eight flavonol glycosides were isolated and identified in pear fruit. By chemical and spectral methods the cinnamics were identified as 5'-caffeoylquinic, p-coumaroylquinic, p-coumaroylmalic, and dicaffeoylquinic esters. The mixture of flavonols included three quercetin and five isorhamnetin glycosides. The quercetin 3-O-glycosides were identified as rutinoside, glucoside, and malonyl glucoside, and the isorhamnetin 3-O-glycosides included rutinoside, galactorhamnoside, glucoside, malonyl galactoside, and malonyl glucoside.