[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [Br][Br].[C][C][=Branch1][C][=O][C][NH1][C][Branch1][C][C][=N][C][=Ring1][=Branch1][C]>>[C][C][=N][C][Branch1][C][C][=C][Branch1][#Branch1][C][=Branch1][C][=O][C][Br][NH1][Ring1][#Branch2]"}, {"from": "gpt", "value": "[Br]"}]