[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [Br][C][=C][C][=C][C][=C][Ring1][=Branch1].[O][=C][C][C][C][C][C][Ring1][=Branch1]>>[O][C][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][C][C][C][Ring1][N]"}, {"from": "gpt", "value": "[C][C][O][C][C].[Cl-1].[Mg].[NH4+1]"}]