Figure 2

Analytical HPLC profile (a) UV-chromatogram (λ = 220 nm), (b) radiochromatogram of freshly prepared 177Lu-DOTA-A9, (c) radiochromatogram of human serum after 6 h incubation with 177Lu-DOTA-A9 and analytical HPLC profile, (d) UV-chromatogram (λ = 220 nm), (e) radiochromatogram of freshly prepared 177Lu-DOTA-PEG4-A9, (f) radiochromatogram of human serum after 6 h incubation with 177Lu-DOTA-PEG4-A9.