2,2-dimethyltetrahydro-2H-pyran-4-carbaldehyde
4-but-3-en-1-ynyl-2,2-dimethyl-3,6-dihydro-2H-pyran
ethyl ester of the 2-ethyl-3-(2,2-dimethyltetryhydropyran-4-yl)-2,3-epoxypropionic acid
2,2-dimethyltetrahydro-2H-pyran-4-carbonitrile
propyl bromide