methyl (S)-2-[bis(tert-butoxycarbonyl) amino]-3-phenylpropanoate

methyl (4S,5R)-3-N-tert-butoxycarbonyl-5-phenyl-1,3-oxazolidin-2-oxo-4-carboxylate

methyl (2S,3R)-2-((tert-butyloxycarbonyl)amino)-3-hydroxy-3-phenylpropionate

Methyl (2S,3S)-2-(acetylamino)-3-hydroxy-3-phenylpropanoate

(2R,3s)-3-苯基丝氨酸