[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [Br][Br].[N][C][=C][C][=C][Branch1][=Branch1][N+1][=Branch1][C][=O][O-1][C][=N][Ring1][=Branch2]>>[N][C][=N][C][=C][Branch1][=Branch1][N+1][=Branch1][C][=O][O-1][C][=C][Ring1][=Branch2][Br]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[O]"}]