[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is under investigation in clinical trial NCT03204305 (Brain Imaging of Cannabinoid Receptors)."}, {"from": "gpt", "value": "[11CH3][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][Branch2][Ring2][Ring2][C][=Branch2][Ring1][Ring1][=N][N][Ring1][Branch1][C][=C][Branch1][#Branch2][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Cl][Cl][C][=Branch1][C][=O][N][N][C][C][C][C][C][Ring1][=Branch1][C][#N]"}]