Using [N-]=[N+]=[N-], CCOC(=O)c1c(C)[nH]c2ccc(OCC3CO3)cc12 to produce CCOC(=O)c1c(C)[nH]c2ccc(OC[C@@H](O)CN=[N+]=[N-])cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.