Using CC(=O)OCC(=O)Nc1ncc(-c2cccc(Nc3nccc(C(F)(F)F)n3)c2)s1 to produce O=C(CO)Nc1ncc(-c2cccc(Nc3nccc(C(F)(F)F)n3)c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.