Using CCOC(=O)C(Br)C(=O)OCC, Cc1cc(C(=O)O)c(C(=O)c2ccccc2)cc1C to produce Cc1cc2c(-c3ccccc3)c(C(=O)O)oc(=O)c2cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.