2S,3R-1-t-butoxycarbonyl-3-(4-chlorophenyl)-5-oxo-pyrrolidine-2-carboxylic acid

dimethyl 3-(p-chlorophenyl)-2-methoxycarbonylglutarate

ethyl (2S,3S)-2-bromo-3-hydroxy-3-(4-chlorophenyl)propanoate

(4-氯苯基)乙醛