Using O=C(O)c1ccc(N2CCN(C(=O)c3ccccc3)CC2)cc1NCc1ccccc1, CCN to produce CCNC(=O)c1ccc(N2CCN(C(=O)c3ccccc3)CC2)cc1NCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.