Using CCOC(=O)c1nc[nH]c1C(=O)OCC, ClCc1ccc(Cl)c(Cl)c1 to produce CCOC(=O)c1ncn(Cc2ccc(Cl)c(Cl)c2)c1C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.