[{"from": "human", "value": "Can you suggest some reagents that might have been used in the given chemical reaction? [C][C][N][C][C][N][Ring1][=Branch1].[Cl][C][=N][C][=C][C][=C][Ring1][=Branch1][Br]>>[Br][C][=C][C][=C][N][=C][Ring1][=Branch1][N][C][C][N][C][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][N][C][C][N][Ring1][=Branch1].[Cl].[Cl].[O]"}]