Acetic acid (1R,2S)-2-amino-1-hydroxymethyl-2-phenyl-ethyl ester

(2R,3S)-2-acetoxy-3-amino-3-phenylpropanoic acid

(4S,5R)-2-Oxo-4-phenyl-oxazolidine-3,5-dicarboxylic acid 3-tert-butyl ester

2-hydroxy-3-(4-methyl benzenesulfonylamino)-3-phenyl-propionic acid methyl ester

methyl (2R,3S)-2-acetoxy-3-phenyl-3-benzoylaminopropanoate