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