Distribution of radioactivity in rats after a single oral administration of radiolabeled 10-NO2-OA. Whole-body autoradiograms of rats euthanized at 1 h (A), 6 h (B), 24 h (C), 48 h (D), 72 h (E), 120 h (F), 168 h (G), and 336 h (H) after an oral administration of 30 mg/kg 10-NO2-[14C]OA (labeled at carbon 10). Radioactivity appears in black (n = 1 for each time point).