[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C][Branch2][Branch1][Ring2][C][C][C][Ring1][=Branch1][C][N][C][=Branch1][C][=O][C][N][C][C][N][Branch2][Ring1][O][C][C][N][Branch1][S][C][C][N][Branch1][Branch1][C][C][Ring1][N][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][N][C@@H1][Branch1][S][C][C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Ring1][#Branch2][C][=Branch1][C][=O][N][C][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O].[68Ga+3]"}, {"from": "gpt", "value": "The molecule is a radioconjugate composed of PSMA-617, a human prostate-specific membrane antigen (PSMA)-targeting ligand, conjugated to the radioisotope gallium Ga 68, with potential use as a tracer for PSMA-expressing tumors during positron emission tomography (PET)/computed tomography (CT). Upon intravenous administration of 68Ga-PSMA-617, the PSMA-617 moiety targets and binds to PSMA-expressing tumor cells. Upon binding, PSMA-expressing tumor cells can be detected during PET/CT imaging. PSMA, a tumor-associated antigen (TAA) and type II transmembrane protein, is expressed on the membrane of prostatic epithelial cells and overexpressed on prostate tumor cells."}]