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