Using CS(=O)(=O)Cl, CC(C)(C)OC(=O)N1CCc2oc3c(CO)cc(Br)cc3c2C1 to produce CC(C)(C)OC(=O)N1CCc2oc3c(COS(C)(=O)=O)cc(Br)cc3c2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.