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a Radiochemical synthesis diagram for [18F]PARPi-FL. The 18F/19F exchange was realized in the presence of SnCl4 at 35 °C for 30 min. [18F]PARPi-FL was purified by reversed-phase high-performance liquid chromatography (RP-HPLC); b representative HPLC chromatograms traces (radioactivity, fluorescence, and absorbance) show the trans-fluorination of [19F]PARPi-FL to [18F]PARPi-FL.
