Using BrP(Br)Br, CCCc1cc(CO)cc(CCC)c1OC(C(=O)OC)c1cccc(Cl)c1 to produce CCCc1cc(CBr)cc(CCC)c1OC(C(=O)OC)c1cccc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.