Using CCOC(=O)C(C)(C)Oc1ccc(OCCc2nc(-c3ccccc3)oc2C)cc1CO, BrC(Br)(Br)Br to produce CCOC(=O)C(C)(C)Oc1ccc(OCCc2nc(-c3ccccc3)oc2C)cc1CBr, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.