[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][O][C][=C][C][=C][Branch1][C][N][C][=C][Ring1][#Branch1][C][C][C][Ring1][Branch1][=O]>>[N][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1][C][=Branch1][C][=O][C][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[Br].[O][=C][Branch1][C][O-1][O].[Na+1]"}]