(a)
(b)
(c)
Figure 1: HPLC chromatogram of white grapefruit peels. Peak assignments: (1) isonaringin; (2) naringin; (3) hesperidin; (4) neohesperidin; (5) unknown-1; (6) unknown-2; (7) naringenin; (8) hesperetin; (9) isosinensetin; (10) sinensetin; (11) unknown-3; (12) nobiletin; (13) tangeretin.