Using COc1ccc2c(OCCn3nc(-c4ccc(CO)c(Cl)c4)ccc3=O)ccnc2c1, [N-]=[N+]=[N-] to produce COc1ccc2c(OCCn3nc(-c4ccc(CN=[N+]=[N-])c(Cl)c4)ccc3=O)ccnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.