Using BrCCBr, CCCCc1oc2ccccc2c1C(=O)c1ccc(O)cc1 to produce CCCCc1oc2ccccc2c1C(=O)c1ccc(OCCBr)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.