[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [C][O][C][=Branch1][C][=O][C][NH1][C][=C][C][=Ring1][Branch1][Cl]>>[O][=C][Branch1][C][O][C][NH1][C][=C][C][=Ring1][Branch1][Cl]"}, {"from": "gpt", "value": "[C][O].[O].[O].[Li][O]"}]