Using O=C(O)CC(O)(CC(=O)O)C(=O)O, COC(=O)c1cc(F)c([N+](=O)[O-])c(C)c1F to produce COc1cc(C(=O)O)c(F)c(C)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.