Using O=N[O-], CC(C)CN1C(NCc2ccc(Cl)cc2)=CC(=O)N2CCN=C21 to produce CC(C)CN1C2=NCCN2C(=O)C(N=O)=C1NCc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.