Using CC(=O)[O-], O=C1c2ccccc2C(=O)c2c1cc1c(c2O)CCC(O)(C(=O)CBr)C1 to produce CC(=O)OCC(=O)C1(O)CCc2c(cc3c(c2O)C(=O)c2ccccc2C3=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.