Using OC(c1ncc(-c2cccc(Nc3nccc(C(F)(F)F)n3)c2)s1)C1CC1 to produce O=C(c1ncc(-c2cccc(Nc3nccc(C(F)(F)F)n3)c2)s1)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.