1,1,1,2,4,4,4-heptafluoro-3-iodobut-2-ene

bis-4,5-(trifluoromethyl)-1,3-dithiole-2-thione

1,1,1,1-tetrakis(trifluoromethyl)thiophene

1,3,5,6,7-pentakis(trifluoromethyl)-2,4-diazabicyclo[3.2.0.]hepta-2,6-diene