Figure 5: HPLC chromatograms of citrus flavonoids in the water phase at 285 nm; (a) Yuzu peel, (b) Ponkan peel, (c) Yuzu leaves. (1) Naringin, (2) Hesperidin, (3) Neohesperidin, (4) Nobiretin, (5) Tangeretin, (6) Phloretin.