Using CCc1ccnnc1, O=C(Cn1cncn1)c1ccc(Cl)cc1Cl to produce CC(c1ccnnc1)C(O)(Cn1cncn1)c1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.