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