Using NCc1cccc(Nc2n[nH]c3ncnc(Nc4cccc(Cl)c4)c23)c1, N=C(N)n1cccn1 to produce N=C(N)NCc1cccc(Nc2n[nH]c3ncnc(Nc4cccc(Cl)c4)c23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.