[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=C][C][=Branch1][=Branch2][=N][C][=Branch1][Ring2][=C][Ring1][=Branch1][N][C][C][Branch1][C][C][18F]"}, {"from": "gpt", "value": "The molecule is a radiotracer composed of an analog of the reversible nitric oxide synthase (NOS) inhibitor, 2-amino 4-methylpyridine, radiolabeled with fluorine F 18, with potential imaging activity upon positron emission tomography/computed tomography (PET/CT). Upon administration of fluorine F 18 NOS, the NOS moiety targets and binds to inducible NOS (iNOS). Upon PET/CT imaging, iNOS expression and thus the extent of inflammation can be assessed. iNOS expression is upregulated in a variety of inflammatory diseases and certain cancers and may invoke a chronic inflammatory state in tumor cells."}]