[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [C][C][Branch1][C][C][Branch1][C][C][O][C][=Branch1][C][=O][N][C][=C][C][=C][Branch1][C][I][C][=C][Ring1][#Branch1][N+1][=Branch1][C][=O][O-1]>>[C][C][Branch1][C][C][Branch1][C][C][O][C][=Branch1][C][=O][N][C][=C][C][=C][Branch1][C][I][C][=C][Ring1][#Branch1][N]"}, {"from": "gpt", "value": "[Cl][Sn][Cl].[O].[O]"}]