[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][N][Branch2][Branch1][Ring1][C][C][N][Ring1][=Branch1][C][C][C][O][C][=C][C][=C][Branch1][O][C][=C][N][=C][Ring1][=Branch1][C][=C][Ring1][#Branch2][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][N][C][C][Branch1][#Branch1][C][C@H1][Ring1][Branch1][C][#N][Branch1][C][F][F][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].[68Ga+3]"}, {"from": "gpt", "value": "The molecule is a radioconjugate composed of FAPI-04, a quinoline-based fibroblast activation protein (FAP)-targeted tracer belonging to the group of FAP inhibitors (FAPi), conjugated, through the macrocyclic chelator 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), to the radioisotope gallium Ga 68, with potential use as a tracer for FAP-expressing cancer-associated fibroblasts (CAFs) during positron emission tomography/computed tomography (PET/CT). Upon administration of gallium Ga 68-DOTA-FAPI-04, the FAPI-04 moiety targets and binds to FAP-expressing CAFs. Upon binding, FAP-expressing cells can be detected during PET/CT imaging. FAP, a cell surface protein, is overexpressed on CAFs in the tumor microenvironment (TME)."}]