Using COC(=O)c1cc(Br)ccc1NS(=O)(=O)c1ccc(OC(F)(F)F)cc1 to produce O=C(O)c1cc(Br)ccc1NS(=O)(=O)c1ccc(OC(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.