PSMA I&S (TFA) is a precursor of the 99mTc-labeled PSMA-targeting ligand[1].
[1]. Robu S, et, al. Preclinical Evaluation and First Patient Application of 99mTc-PSMA-I&S for SPECT Imaging and Radioguided Surgery in Prostate Cancer. J Nucl Med. 2017 Feb;58(2):235-242.
















