Using [Br-], Cc1ccc(S(=O)(=O)OC[C@@H](C)OC(=O)c2ccc(C(=N)N3CCCC3)cc2)cc1 to produce C[C@H](CBr)OC(=O)c1ccc(C(=N)N2CCCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.