2,2,4,4,6,8,8-HEPTAMETHYLNONANE

2,2,4,4-TETRAFLUORO-1,3-DITHIETANE

2,2,4,4-TETRAMETHYL-1,3-CYCLOBUTANEDIOL

2,2,5,5-TETRAKIS(CHLOROMETHYL)CYCLOPENTANONE

2,2,5,5-TETRAKIS(HYDROXYMETHYL)CYCLOPENTANONE

4-CARBOXY-2,2,5,5-TETRAMETHYL-3-IMIDAZOLINE-3-OXIDE-1-OXYL,FREE RADICAL

2,2',6,6'-Tetrachlorodibenzylether

2,2',6,6'-TETRAMETHYL-4,4'-BIPYRIDINE

4,4'-Dimethyl-2,2'-bipyridyl