Ethyl 4,5-O-isopropylidene-(S)-4,5-dihydroxypentanoate

γ-benzyloxymethyl-α,β-butenolide

5-氧代四氢呋喃-2-羧酸乙酯

D-(+)-核糖酸-1,4-内酯

(S)-(-)-Tetrahydro-5-oxo-2-furancarboxaldehyde