Using [N-]=[N+]=[N-], O=C(CN1C(=O)c2ccccc2C1=O)NCc1ccccc1 to produce O=C1c2ccccc2C(=O)N1Cc1nnnn1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.