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