(2R,3S)-3-benzyloxycarbonylamino-2-hydroxy-1-(N-isobutylamino)-4-phenylbutane
methyl isocyanate
N-benzyloxycarbonyl-3(S)-amino-1-chloro-4-phenyl-2(S)-butanol
(S)-benzyl (4-chloro-3-oxo-1-phenylbutan-2-yl)carbamate
N-benzyloxycarbonyl-3(S)-amino-1,2(S)epoxy-4-phenylbutane