[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an analog of fentanyl and is one of the most potent opioids available today. It displays most similarity to carfentanil (4-carbomethoxyfentanyl) and is considered to be slightly more potent than this drug."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][N][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C@][Branch2][Ring1][Branch1][C][C][N][Branch1][=Branch1][C][C@H1][Ring1][=Branch1][C][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C]"}]