Using CCOC(=O)C1=NOC(C(O)(C(F)(F)F)C(F)(F)F)C1 to produce O=C(O)C1=NOC(C(O)(C(F)(F)F)C(F)(F)F)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.