Get C7 H2 BR4 N2 S = k22 = 4,5,6,7-tetrabromo-1h,3h-benzimidazol-2-thione Get C8 H4 BR4 N2 S = k37 = 4,5,6,7-tetrabromo-2-(methylsulfanyl)-1h-benzimidazole; s-methyl-4,5,6,7-tetrabromo-benzimidazole
