Using CSc1sc(C(=N)NC(=O)OC(C)(C)C)cc1S(=O)(=O)c1cccc(-c2c(C)cccc2CO)c1, CCOC(=O)CCBr to produce CCOC(=O)CCOCc1cccc(C)c1-c1cccc(S(=O)(=O)c2cc(C(=N)NC(=O)OC(C)(C)C)sc2SC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.