Using O=C(Oc1cc(Cl)c(OCc2ccc(F)c(Oc3ccccc3)c2)c(Cl)c1)c1ccccc1 to produce Oc1cc(Cl)c(OCc2ccc(F)c(Oc3ccccc3)c2)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.