Using O=C(Cl)c1cccnc1, CC(=O)c1cc(Cl)c2cccnc2c1N1CCNCC1 to produce CC(=O)c1cc(Cl)c2cccnc2c1N1CCN(C(=O)c2cccnc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.