Using COc1ccc(Cl)c(Nc2ncnc3cc(OCc4ccccc4)cc(OCCCN4CCCC4)c23)c1 to produce COc1ccc(Cl)c(Nc2ncnc3cc(O)cc(OCCCN4CCCC4)c23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.