Using CSc1nc(N)nc(NCC(=O)Nc2cccc(C(F)(F)F)c2)c1C=O to produce CSc1nc(N)nc(NCC(=O)Nc2cccc(C(F)(F)F)c2)c1CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.