Using N#Cc1ccc(CN2CCC(Cc3nc4ccc(Cl)cc4[nH]3)CC2=O)cc1, N to produce N=C(N)c1ccc(CN2CCC(Cc3nc4ccc(Cl)cc4[nH]3)CC2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.