Using O=C(NC(Cc1ccccc1)C(=O)C(F)(F)F)c1ccccc1 to produce O=C(NC(Cc1ccccc1)C(O)C(F)(F)F)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.