Using BrBr, CC(C)CC(=O)c1c(-c2ccc3cc(O)ccc3c2)oc2ccccc12 to produce CC(C)CC(=O)c1c(-c2ccc3cc(O)cc(Br)c3c2)oc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.