[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][C][C][C][N][C][C][Ring1][=Branch1].[O][C][C][Br]>>[C][C][C][C][N][Branch1][Ring2][C][C][O][C][C][Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][N][Branch1][Ring1][C][C][C][C].[Cl][C][Branch1][C][Cl][Cl]"}]