N-n-Propyl-2-benzyliden-aceto-acetamid

6-methyl-2-phenyl-3-propyl-2H-1,3-oxazin-4-one

3-cyclohexyl-6-methyl-2-phenyl-2H-1,3-oxazin-4-one

6-(bromomethyl)-2,2-dimethyl-1,3-dioxin-4-one

6-(chloromethyl)-2,2-dimethyl-1,3-dioxin-4-one