[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is an arsenical drug believed to be the first modern chemotherapeutic agent. It was used to treat syphilis and trypanosomiasis."}, {"from": "gpt", "value": "[C][=C][C][=Branch2][Ring1][#Branch2][=C][Branch2][Ring1][Branch1][C][=C][Ring1][=Branch1][As][=As][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][N][N][O].[Cl].[Cl]"}]