Using ClCc1ccc(Cl)cc1, O=c1cc(O)cnn1-c1ccc(Cl)cc1 to produce O=c1cc(OCc2ccc(Cl)cc2)cnn1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.