[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is under investigation in clinical trial NCT01507428 (Study of Positron Emission Tomography and Computed Tomography in Guiding Radiation Therapy in Patients With Stage III Non-small Cell Lung Cancer)."}, {"from": "gpt", "value": "[C][=C][N][Branch1][N][C][=Branch1][Ring2][=N][Ring1][Branch1][N+1][=Branch1][C][=O][O-1][C][C][Branch1][Ring1][C][18F][O]"}]