4-prop-2-enoxybut-2-en-1-ol

3-[2-(chloromethyl)aziridin-1-yl]-2-ethylquinazolin-4-one

prop-2-enyl 2-methyl-3-oxobutanoate

5-ethyl-2,2-dimethyl-5-(prop-2-enoxymethyl)-1,3-dioxane

5-but-3-enylideneoxolan-2-one