Using CC(C)(C)OC(=O)N1CCc2cc(O)c(NS(C)(=O)=O)cc2CC1, BrCCBr to produce CC(C)(C)OC(=O)N1CCc2cc3c(cc2CC1)N(S(C)(=O)=O)CCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.