[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a synthetic analogue of meperidine. It is sold as a \"synthetic heroin.\""}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O][C][Branch2][Ring1][Ring2][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]