1-cyclohexyl-1-phenylprop-2-yn-1-ol

9-ethynylxanthen-9-ol

1-ethynyl-2,3,4,5-tetraphenylcyclopenta-2,4-dien-1-ol

tert-butyl-(2-methylhept-6-ynoxy)-diphenylsilane

2-undec-10-ynyl-1,3-dioxolane