Using BrC1CC1, COC(=O)Cc1ccc2c(c1)C(=O)c1sccc1CO2 to produce COC(=O)Cc1ccc2c(c1)C(O)(C1CC1)c1sccc1CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.