2,2,6,6-tetramethyl-5-methylidenehept-3-ene

2,2,5,5-tetramethyl-3,4-dimethylidenehexane

trans,trans-2,2,7,7-tetramethylocta-3,5-diene

trans,trans-1-t-butyl-1,4-hexadien

3,3-dimethylbut-1-ynyl(diphenyl)phosphane