Using O=I(=O)Cl, COc1ccc(Oc2c(Br)cc(CC(=O)O)cc2Br)cc1C(C)C to produce CC(C)c1cc(Oc2c(Br)cc(CC(=O)O)cc2Br)cc(Cl)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.