Using BrC(Br)(Br)Br, CC(C)(C)Oc1cc(CO)ccc1OCCOCc1ccccc1 to produce CC(C)(C)Oc1cc(CBr)ccc1OCCOCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.