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