Using Cn1ccc(S(=O)(=O)N(Cc2ccc(Cl)cc2)c2cccc(O)c2)n1, CC(C)(C)OC(=O)CBr to produce Cn1ccc(S(=O)(=O)N(Cc2ccc(Cl)cc2)c2cccc(OCC(=O)OC(C)(C)C)c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.