Using CI, CCOC(=O)C(C(=O)OC(C)(C)C)c1ccc([N+](=O)[O-])nc1C to produce CCOC(=O)C(C)(C(=O)OC(C)(C)C)c1ccc([N+](=O)[O-])nc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.