Using O=C(O)C(c1ccccc1)N1C(=O)c2ccccc2C1=O, O=C(n1ccnc1)n1ccnc1 to produce NC(=O)C(c1ccccc1)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.