Using BrC(Br)(Br)Br, OCCOCCOCCOC(c1ccccc1)(c1ccccc1)c1ccccc1 to produce CC(Br)OCCOCCOC(c1ccccc1)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.