Using CCOC(=O)c1ccc(C(C(=O)NCc2ccc(F)c(F)c2)C(=O)C(C)(C)C)c([N+](=O)[O-])c1 to produce CCOC(=O)c1ccc2c(C(=O)NCc3ccc(F)c(F)c3)c(C(C)(C)C)[nH]c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.