Using NN, Cc1nc(Cl)cc(N2CC(c3nc4ccccc4n3C)C2)n1 to produce Cc1nc(NN)cc(N2CC(c3nc4ccccc4n3C)C2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.