Using Cc1c(C)c2c3c(cc(C)c2[nH]c1=O)CC(CN=[N+]=[N-])O3 to produce Cc1c(C)c2c3c(cc(C)c2[nH]c1=O)CC(CN)O3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.