Using COC(=O)[C@@H](NS(=O)(=O)c1cc(Br)c(Cl)s1)C(C(F)(F)F)C(F)(F)F to produce O=S(=O)(NC(CO)C(C(F)(F)F)C(F)(F)F)c1cc(Br)c(Cl)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.