Using CCCCOC(=O)c1nc(O)c2cccc(-c3ccccc3)c2c1O, O=P(Br)(Br)Br to produce CCCCOC(=O)c1nc(Br)c2cccc(-c3ccccc3)c2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.