Using Cc1cc(N(C)C(=O)OC(C)(C)C)cc(C)c1CCS(=O)(=O)N1CCC2(CC1)OCCO2, ClCCBr to produce Cc1cc(N(C)C(=O)OC(C)(C)C)cc(C)c1CC(CCCl)S(=O)(=O)N1CCC2(CC1)OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.