Using OB(O)c1cccnc1, Nc1nc2cc(-c3cccnc3)cc(Cl)n2n1 to produce Nc1nc2cc(-c3cccnc3)cc(-c3cccnc3)n2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.