[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [Br][Br].[C][O][C][=C][C][=C][C][Branch1][C][C][=N][Ring1][#Branch1]>>[C][O][C][=C][C][=C][Branch1][C][Br][C][Branch1][C][C][=N][Ring1][Branch2]"}, {"from": "gpt", "value": "[O].[O][=P][Branch1][C][O-1][Branch1][C][O-1][O].[Na+1].[Na+1]"}]