2,2'-bipyridine, 4,4'-dibromo-6,6'-bis(bromomethyl)- 4,4'-dibromo-6,6'-bis(bromomethyl)-2,2'-bipyridine InChI=1/C12H8Br4N2/c13-5-9-1-7(15)3-11(17-9)12-4-8(16)2-10(6-14)18-12/h1-4H,5-6H