Using CNS(=O)(=O)c1cccc(CN)c1, O=C(O)c1cnc(-c2cccnc2)nc1 to produce CNS(=O)(=O)c1cccc(CNC(=O)c2cnc(-c3cccnc3)nc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.