[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][C][=Branch1][C][=O][N][Branch2][Ring1][Branch2][C][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][Branch1][C][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is an analog of fentanyl with opioid analgesic properties."}]