Using BrCc1ccccc1, CCOC(=O)CCc1c(O)c2ccccc2oc1=O to produce CCOC(=O)C(Cc1ccccc1)Cc1c(O)c2ccccc2oc1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.