Using O=[N+]([O-])c1ccc(Cl)cc1C(F)(F)F, CCOC(=O)C(CC(C)C)C(=O)OCC to produce CCOC(=O)C(CC(C)C)(C(=O)OCC)c1ccc([N+](=O)[O-])c(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.