ethyl (3S)-3-{[tert-butyl(dimethyl)silyl]oxy}butanoate

ethyl (3R)-4,4,4-trichloro-3-hydroxybutanoate

(S)-methyl 3-hydroxybutanedithioate

4-(苯硫基)乙酰乙酸乙酯

ethyl (R)-3-hydroxy-4-(phenylthio)butanoate