Using CC(C)(C)OC(=O)OC(C)(C)C, Nc1n[nH]c2ccc([N+](=O)[O-])cc12 to produce CC(C)(C)OC(=O)Nc1n[nH]c2ccc([N+](=O)[O-])cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.