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