[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [O][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][Ring1][#Branch2][C][C][C][C][O]>>[O][=C][C][C][C][N][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Ring1][#Branch2][=O]"}, {"from": "gpt", "value": "[C][S][Branch1][C][C][=O].[Cl].[Cl][C][Cl].[O][=C][Branch1][C][Cl][C][=Branch1][C][=O][Cl]"}]