Using O=C1N(Cc2c(Cl)cc(OCc3ccccc3)cc2Cl)CCC12CCCCC2 to produce O=C1N(Cc2c(Cl)cc(O)cc2Cl)CCC12CCCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.