Using COc1c(-c2ccoc2)ccc(CSc2ccccc2)c1C(=O)O, BrCc1ccccc1 to produce COc1c(-c2ccoc2)ccc(CSc2ccccc2)c1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.