Using CCOC(=O)CSc1nc(Cl)cc(Cl)n1, NCc1ccc(Cl)c(Cl)c1 to produce O=C(O)CSc1nc(Cl)cc(NCc2ccc(Cl)c(Cl)c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.