Using O=C(Cl)c1ccc(N2CCC(CC3CCN(C4CCC4)CC3)CC2)cn1, CN to produce CNC(=O)c1ccc(N2CCC(CC3CCN(C4CCC4)CC3)CC2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.