[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=Branch2][Ring2][N][=N][C][=C][Ring1][=Branch1][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][18F]"}, {"from": "gpt", "value": "The molecule is a urea-based radiotracer composed of the prostate specific membrane antigen (PSMA) targeting agent DCFPyL and labeled with the positron-emitting isotope, fluorine F 18, that can potentially be used for positron emitting tomography (PET) imaging. Upon administration of fluorine F piflufolastat, piflufolastat binds to PSMA expressed on tumor cells. The fluorine F 18 moiety facilitates PET imaging of PSMA-expressing tumor cells. PSMA, a cell-surface antigen, is abundantly present on the surface of prostate cancer cells and on the neovasculature of most solid tumors."}]