JR11-PEG3-HBED-CC-PSMA-03 (Compound 1) is an RDC-related compound containing the chelating agent HBED-CC, the JR11 peptide (SSTR2 antagonist), and the PSMA ligand. JR11-PEG3-HBED-CC-PSMA-03 shows SSTR2-binding affinities and PSMA-binding affinities, with IC50 s of 59.2 nM, 57.0 nM, respectively. JR11-PEG3-HBED-CC-PSMA-03 can be radiolabeled with [68Ga]. [68Ga] radiolabeled JR11-PEG3-HBED-CC-PSMA-03 can be used in diagnostic studies of neuroendocrine differentiated prostate cancer[1].
