4.2.2. Radiosynthesis of [18F]10

The formulated [18F]**6** was added onto the lyophilized albumin-TCO (350 μg) and incubated at room temperature for 15 min. The produced [18F]fluoroalbumin ([18F]10) was purified by centrifugation (10,000 *g*, Eppendorf Centrifuge 5430, Ag, Hamburg, Germany) with molecular weight cut-off (MWCO) filters (30K, VWR®, Radnor, PA, USA), with 0.01 M PBS as the eluent, sterile-filtered and used as such for injections. The apparent molar activity was 1.1 GBq/μmol of protein at EOS. The radio-HPLC chromatogram of the purified [18F]**10** is presented in the Supplementary Data (Figure S11).

#### *4.3. In Vitro Experiments*
