Using O=C=O, CC(C)(C)OC(=O)Nc1ccc(OC(F)(F)F)cc1 to produce CC(C)(C)OC(=O)Nc1ccc(OC(F)(F)F)cc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.