Using COC(=O)CCCCC(=O)O, O=C(O)Cc1cc(Br)ccc1C(=O)O to produce COC(=O)CCCCc1cc2cc(Br)ccc2c(=O)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.