1,1'-biphenyl, 2,2',5,5'-tetrabromo- InChI=1/C6H8O4/c7-3-2-9-4-1-5(8)10-6(3)4/h3-4,6-7H,1-2H2/t3-,4-,6-/m0/s rel-(3aR,6R,6aR)-6-hydroxytetrahydrofuro[3,2-b]furan-2(3H)-one (non-preferred name)