4-acetoxypentanoic acid

(R)-γ-羟甲基-γ-丁内酯 (R)-4,5-二氢-5-羟甲基-2(3H)-呋喃酮 (R)-5-羟甲基-2-氧代四氢呋喃

ethyl 3-chloro-4-oxopentanoate

(–)-(2E)-(4R)-ethyl 4-hydroxy-2-pentenoate

(3R,4R)-3-Chloro-4-hydroxy-pentanoic acid ethyl ester