[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][C][C][N][C][C][Ring1][=Branch1].[Cl][C][C][C][C][Br]>>[Cl][C][C][C][C][N][C][C][C][C][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "[O][=C][Branch1][C][O-1][O-1].[K+1].[K+1]"}]