Using Cc1nncn1-c1ccccc1, O=C1CCN(CCc2ccccc2)CC1 to produce Cc1nnc(C2(O)CCN(CCc3ccccc3)CC2)n1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.