[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [Br][Br].[C][O][C][=C][C][=C][Branch1][C][Br][C][=N][Ring1][#Branch1]>>[C][O][C][=N][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][Br]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[C][C][=Branch1][C][=O][O-1].[C][C][O][C][C].[Na+1]"}]