Flavonol glycosides from melon de olor (Sicana odorifera) fruit peel and evaluation of their antioxidant activity

AGFD 9

Coralia Osorio, cosorior@unal.edu.co1, Katherine Jaramillo1, Carmenza Duque1, and Yoshinori Fujimoto2. (1) Departamento de Química, Universidad Nacional de Colombia, AA 14490, Bogotá, DC, Colombia, (2) Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, 152-8551, Tokyo, Japan
Sicana odorifera (Vell) Naudin, is a Cucurbitaceae native to South America, which fruit exhibits an intense and pleasant aroma. The ripe flesh, sliced thin is eaten raw or mainly used in the kitchen for making jams or other preserves; however the peel is usually discarded. As part of our current studies on tropical fruits, several flavonol glycosides and anthocyanins were isolated from the methanolic extract of fruit peel by solvent partition, multilayer countercurrent chromatography (MLCCC) and preparative HPLC. Their chemical structures were elucidated by using UV, ESI/MS, and NMR spectroscopy, and respective contribution to the overall antioxidant activity established by TEAC assay. Quercetin 3-O-(6''-O-&alpha-rhamnopyranosyl)-&beta-glucopyranoside (307 mg/100 g peel) was the predominant flavonol and correlated to antoxidant content.
 

Characterization and Bioavailability of Flavonoid Glycosides
8:00 AM-12:10 PM, Sunday, August 19, 2007 BCEC -- 255, Oral

Division of Agricultural & Food Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007