2,2'-bis(4,6-pyrimidinediyl)puridine-6,6'-didiethyl diamide, 2,2'-bis(4,6-pyrimidinediyl)pyridine-6,6'-diethyl diamide, 2,2-bis-(4-acetoxy-3,5-dibromo-phenyl)-propane, 2-Pyridinecarboxamide,6,6'-(4,6-pyrimidinediyl)bis[N,N-diethyl, 4,4'-isopropylidenebis(2,6-dibromophenyl) diacetate, 2,2-Bis-(4-acetoxy-3,5-dibrom-phenyl)-propan