Using Cc1sc2c(Br)c3ccccc3c(-c3ccc(O)c(C4CCCC4)c3)c2c1C, BrBr to produce Cc1sc2c(Br)c3ccccc3c(-c3cc(Br)c(O)c(C4CCCC4)c3)c2c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.