Synonyms: Benzenebutanoicacid, b-[[(1,1-dimethylethoxy)carbonyl]amino]-a-hydroxy-, [S-(R*,R*)]-;(2S,3S)-(-)-3-(tert-Butoxycarbonylamino)-2-hydroxy-4-phenylbutanoic acid;(2S,3S)-3-[(tert-Butoxycarbonyl)amino]-2-hydroxy-4-phenylbutyric acid;(2S,3S)-3-tert-Butoxycarbonylamino-2-hydroxy-4-phenylbutanoic acid