Using Nc1nc(Cl)cc(Cl)n1, COC(=O)c1cnn2cc(O)ccc12 to produce COC(=O)c1cnn2cc(Oc3cc(Cl)nc(N)n3)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.