Using COC(=O)c1ccnc(NCCCN2CCN(c3cccc(Cl)c3)CC2)n1, CN to produce CNC(=O)c1ccnc(NCCCN2CCN(c3cccc(Cl)c3)CC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.