Using COc1ccc2c(c1)CN(Cc1ccccc1)CC2=O, [N-]=[N+]=[N-] to produce COc1ccc2c(c1)CN(Cc1ccccc1)CC(=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.