1-ethynyl-4c-tert-butyl-cyclohexan-r-ol

1-(2,2,7,7-tetramethyl-5,5a,8a,8b-tetrahydro-3aH-di[1,3]dioxolo[5,4-a:5',4'-d]pyran-5-yl)prop-2-yn-1-one

ethynyltellanylbenzene

1-(4-fluorophenoxy)but-3-yn-2-ol

2-methyl-1-phenoxybut-3-yn-2-ol