Using C[C@@H](O)c1nc2cnc3ccsc3c2n1[C@H]1CC[C@H](CN=[N+]=[N-])OC1 to produce C[C@@H](O)c1nc2cnc3ccsc3c2n1[C@H]1CC[C@H](CN)OC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.