Using BrP(Br)Br, O=c1cc(CCc2ccccc2)ccn1CCc1ccc(CO)cc1 to produce O=c1cc(CCc2ccccc2)ccn1CCc1ccc(CBr)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.