Using COCN(c1cccc(-c2csc(C3CCOCC3)n2)c1F)S(=O)(=O)c1cc(F)ccc1F, BrBr to produce COCN(c1cccc(-c2nc(C3CCOCC3)sc2Br)c1F)S(=O)(=O)c1cc(F)ccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.