Using CC(C)(C)OC(=O)CCN, O=C(O)c1ccc(COc2cc(-c3ccc(OC(F)(F)F)cc3)cc3ccccc23)cc1 to produce CC(C)(C)OC(=O)CCNC(=O)c1ccc(COc2cc(-c3ccc(OC(F)(F)F)cc3)cc3ccccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.