Using O=C(Cn1cncn1)c1ccc(Cl)cc1, CC(Cl)c1ccccc1 to produce CC(c1ccccc1)C(C(=O)c1ccc(Cl)cc1)n1cncn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.