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