Using COc1ccc(-c2nc(N)nc(N)n2)c2ccccc12, O=C(O)c1cccnc1 to produce COc1ccc(-c2nc(N)nc(NC(=O)c3cccnc3)n2)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.