Using N=C(N)N, N#Cc1nc(-c2cc(Cl)cc(Cl)c2)cnc1N to produce Nc1nc(N)c2nc(-c3cc(Cl)cc(Cl)c3)cnc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.