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