(2013/03/26)
[(R)-1-[(S)-1-(4-cyano-benzylcarbamoyl)-2-phenyl-ethylcarbamoyl]-2-(4-ethoxy-phenyl)-ethyl]-carbamic acid tert-butyl ester
(S)-2-[(R)-2-tert-butoxycarbonylamino-3-(4-ethoxy-phenyl)-propionylamino]-3-phenyl-propionic acid
(S)-2-[(R)-2-tert-butoxycarbonylamino-3-(4-ethoxy-phenyl)-propionylamino]-3-phenyl-propionic acid methyl ester
propionyl chloride
(R)-2-((tert-butoxycarbonyl)amino)-3-(4-ethoxyphenyl)propanoic acid