DOTA.SA.FAPi TFA inhibits fibroblast activation protein (FAP) with an IC50 of 0.9 nM. DOTA.SA.FAPi TFA targets protease PREP with an IC50 of 5.4 µM. DOTA.SA.FAPi TFA can be used a PET tracer, when labeled with 68Ga, and used for research about cancer[1]. DOTA.SA.FAPi (TFA) can be used for the synthesis/research of Radionuclide-Drug Conjugates (RDCs).