Using CCOC(=O)C(C(=O)OC(C)(C)C)c1c([N+](=O)[O-])cc([N+](=O)[O-])c2ccccc12 to produce CCOC(=O)Cc1c([N+](=O)[O-])cc([N+](=O)[O-])c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.