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