UHPLC-(ESI)QTOF MS/MS Profiling of Quercetin Metabolites in Human Plasma Postconsumption of Applesauce Enriched with Apple Peel and Onion Jihyun Lee, Susan E. Ebeler, Jerry A. Zweigenbaum, and Alyson E. Mitchell Journal of Agricultural and Food Chemistry 2012 60 (34), 8510-8520