Using COC(=O)c1ccc(-c2nnc(-c3ccc(C(C)(C)C)cc3)o2)c([N+](=O)[O-])c1 to produce CC(C)(C)c1ccc(-c2nnc(-c3ccc(C(=O)O)cc3[N+](=O)[O-])o2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.