Using O=C(O)c1cc(O)c2ccccc2c1O, CCCCCCCCCCCCCCCCBr to produce CCCCCCCCCCCCCCCCOc1cc(C(=O)O)c(O)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.