Using OC(c1cncc(-c2sccc2-c2cc(Cl)ccc2OCc2ccccc2)c1)C(F)(F)F to produce O=C(c1cncc(-c2sccc2-c2cc(Cl)ccc2OCc2ccccc2)c1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.