Using CCCCCCCc1ccc(-c2cnc(-c3ccc(OC)c(F)c3)nc2)cc1 to produce CCCCCCCc1ccc(-c2cnc(-c3ccc(O)c(F)c3)nc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.