[{"from": "human", "value": "Based on the given chemical reaction, suggest some possible reagents. [Br][Br].[C][O][C][=C][C][=C][C][Branch1][C][C][=C][Ring1][#Branch1][N]>>[C][O][C][=C][C][Branch1][C][Br][=C][C][Branch1][C][C][=C][Ring1][Branch2][N]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[C][O]"}]