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