[{"from": "human", "value": "Provide a brief overview of this molecule. [H+1].[C][=C][C][=Branch2][Branch2][#Branch1][=C][Branch2][Branch1][#Branch1][C][=C][Ring1][=Branch1][C][C][C][=Branch1][C][=O][N][C][C][C][C][C][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][C][N][Branch2][Ring2][C][C][C][N][Branch2][Ring1][=Branch1][C][C][=C][Branch1][S][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][C][=Branch1][C][=O][O][O-1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][O-1].[68Ga+3]"}, {"from": "gpt", "value": "The molecule is a radioconjugate composed of a human prostate specific membrane antigen (PSMA)-targeting ligand, Glu-urea-Lys(Ahx) (Glu-NH-CO-NH-Lys(Ahx)), conjugated, via the acyclic radiometal chelator N,N'-bis [2-hydroxy-5-(carboxyethyl)benzyl] ethylenediamine-N,N'-diacetic acid (HBED-CC), to the radioisotope gallium Ga 68, with potential use as a tracer for PSMA-expressing tumors during positron emission tomography (PET). Upon intravenous administration of the gallium Ga 68 gozetotide, the Glu-urea-Lys(Ahx) moiety targets and binds to PSMA-expressing tumor cells. Upon internalization, PSMA-expressing tumor cells can be detected during PET imaging. PSMA, a tumor-associated antigen and type II transmembrane protein, is expressed on the membrane of prostatic epithelial cells and overexpressed on prostate tumor cells."}]