1,2-Oxathiin, 5,6-dihydro-4-(4-methylphenyl)-, 2,2-dioxide

4-methylbenzenesulfonic acid,4-phenylbut-3-yn-1-ol

3-but-3-ynyl-1,3-oxazolidin-2-one

4-methylbenzenesulfonic acid,3-methylidenepent-4-en-1-ol

3-but-3-ynylsulfanyl-6-methyl-2H-1,2,4-triazin-5-one