Using O=S(=O)(Cl)c1ccc(Br)cc1, COC(=O)[C@@H](N)C(C)C to produce COC(=O)[C@@H](NS(=O)(=O)c1ccc(Br)cc1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.