Using Cn1nc(-c2cc(Cl)c(OCc3ccccc3)c(Cl)c2)c2cnc(N)nc21 to produce Cn1nc(-c2cc(Cl)c(O)c(Cl)c2)c2cnc(N)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.