[{"from": "human", "value": "Could you provide a description of this molecule? [C][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][/C][=C][/C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][C][O][C][C][O][C][C][18F]"}, {"from": "gpt", "value": "The molecule is a fluorine-18 (18F)-labeled stilbene derivative used for Positron Emission Tomography (PET) imaging of the brain. It is used for the non-invasive detection of the density of \u00df-amyloid neuritic plaques in the brain of adult patients with cognitive impairment."}]