JR11-PEG3-DOTA-PSMA-03 (Compound 2) is an RDC-related compound containing the chelating agent DOTA (HY-W053583), the JR11 peptide (SSTR2 antagonist), and the PSMA ligand. JR11-PEG3-DOTA-PSMA-03 shows SSTR2-binding affinities and PSMA-binding affinities, with IC50 s of 94.0 nM, 81.8 nM, respectively. JR11-PEG3-DOTA-PSMA-03 can be radiolabeled with [68Ga]. [68Ga] radiolabeled JR11-PEG3-DOTA-PSMA-03 can be used in diagnostic studies of neuroendocrine differentiated prostate cancer[1].
