[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][=Branch1][C][=O][C][C][C][O].[C][O][C][Cl]>>[C][O][C][O][C][C][C][C][Branch1][C][C][=O]"}, {"from": "gpt", "value": "[C][C][N][Branch1][=Branch1][C][Branch1][C][C][C][C][Branch1][C][C][C].[Cl][C][Cl]"}]