valofane

N-carbamoyl-5-methyl-2-oxo-3-prop-2-enyloxolane-3-carboxamide

3-allyl-N-carbamoyl-2-keto-5-methyl-tetrahydrofuran-3-carboxamide

N-aminocarbonyl-5-methyl-2-oxo-3-prop-2-enyl-oxolane-3-carboxamide

N-(Aminocarbonyl)tetrahydro-5-methyl-2-oxo-3-(2-propenyl)-3-furancarboxamide