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Representative HPLC radiochromatogram (A) and UV-chromatogram (B) of purified 68Ga-FAPI-46 showing the disappearance of the precursor (Rt = 8:03 min:s, Figure S2A) and the presence of a variety of compounds with different elution time from the product (Rt = 7:45 min:s, Figure S2B). The large peak eluting with the solvent front is ascorbic acid. The retention times (Rt) are indicated as min:s.
