methyl (4S,6R)-α,6-dimethyl-β,2-dioxo-1,3-dioxane-4-pentanoate

(4S,6S)-4-(3-butenyl)-6-(iodomethyl)-1,3-dioxan-2-one

(R)-3-methyl-5-iodomethyl-2-isoxazoline

methyl (5S)-α,3-dimethyl-β-oxo-2-isoxazoline-5-pentanoate