Using NNc1ccc(Cl)nn1, CCOC(=O)C(=O)CC(=O)c1ccccn1 to produce CCOC(=O)c1cc(-c2ccccn2)n(-c2ccc(Cl)nn2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.