(5S,6R)-5-Chloro-6-methyl-4-oxo-3-((S)-1-phenyl-ethyl)-tetrahydro-pyrimidine-1-carboxylic acid benzyl ester
(2R,3R)-3-Methyl-aziridine-2-carboxylic acid ((S)-1-phenyl-ethyl)-amide
(1'S,6R)-1-benzyloxycarbonyl-3-(1'-phenyleth-1'-yl)-6-methylperihydropyrimidin-4-one
(1'S,2S,3R)-N-(1'-phenylethyl)-3-amino-2-chlorobutanamide
acetic anhydride