bis-[1,2,4,6-tetramethyl-1,4-dihydropyridinyl-(4)]

7-methylidenebicyclo[4.1.0]heptane

1,1'-diethyl-2,2',4,4',6,6'-hexamethyl-1,1',4,4'-tetrahydro-4,4'-bipyridine

6,6'-Diethyl-1,2,4,1',2',4'-hexamethyl-1,4,1',4'-tetrahydro-[4,4']bipyridinyl

4,4'-Diethyl-1,2,6,1',2',6'-hexamethyl-1,4,1',4'-tetrahydro-[4,4']bipyridinyl