Using COc1ccc(C(F)(F)F)c(C(=O)O)c1NC(=O)C(C)(C)C, COS(=O)(=O)OC to produce COC(=O)c1c(C(F)(F)F)ccc(OC)c1NC(=O)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.