Using OCc1ccnc(Nc2ccc(Cl)cc2)n1, O=c1ccc2cc(O)ccc2[nH]1 to produce O=c1ccc2cc(OCc3ccnc(Nc4ccc(Cl)cc4)n3)ccc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.