[{"from": "human", "value": "Given the following chemical reaction, what are some potential reagents that could have been employed? [Br][Br].[N][#C][C][=C][C][=C][Branch1][C][N][N][=C][Ring1][#Branch1]>>[N][#C][C][=C][N][=C][Branch1][C][N][C][Branch1][C][Br][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[C][C][=Branch1][C][=O][O-1].[O].[Na+1]"}]