Using O=C([O-])[O-], COC(=O)c1cc2nc3n(c2cc1S(C)(=O)=O)CCN(c1ncc(Br)c(C(F)(F)F)n1)[C@@H]3C(C)C to produce COC(=O)c1cc2nc3n(c2cc1S(C)(=O)=O)CCN(c1ncc(C)c(C(F)(F)F)n1)[C@@H]3C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.