[{"from": "human", "value": "Based on the given chemical reaction, suggest some possible reagents. [N][C][=C][C][=C][C][=C][Ring1][=Branch1][Br].[O][=C][Branch1][C][Cl][C][Br]>>[O][=C][Branch1][Ring1][C][Br][N][C][=C][C][=C][C][=C][Ring1][=Branch1][Br]"}, {"from": "gpt", "value": "[Cl][C][Cl].[C][=C][C][=N][C][=C][Ring1][=Branch1]"}]