Using CCOC(=O)C(C(=O)OCC)C(=O)c1c(F)c(C)c(F)c(F)c1[N+](=O)[O-] to produce CCOC(=O)CC(=O)c1c(F)c(C)c(F)c(F)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.