[{"from": "human", "value": "Please provide possible reagents based on the following chemical reaction. [Br][Br].[C][O][C][=C][C][=N][C][Branch1][Ring1][O][C][=C][Ring1][Branch2]>>[C][O][C][=C][C][Branch1][Ring1][O][C][=C][Branch1][C][Br][C][=N][Ring1][=Branch2]"}, {"from": "gpt", "value": "[O].[Br-1].[K+1].[K+1].[OH1-1]"}]