[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][O][C][=C][C][=C][NH1][N][=C][C][Ring1][Branch1][=C][Ring1][=Branch2]>>[O][C][=C][C][=C][NH1][N][=C][C][Ring1][Branch1][=C][Ring1][=Branch2]"}, {"from": "gpt", "value": "[Br][B][Branch1][C][Br][Br].[Cl][C][Cl].[O].[O][=C][Branch1][C][O-1][O].[Na+1]"}]