[(1S,3S,4S)-4-Amino-3-hydroxy-5-phenyl-1-(phenyl-methyl)pentyl]carbamic acid 1,1-dimethyl ethyl estertert-Butyl ((2S,4S,5S)-5-amino-4-hydroxy-1,6-diphenylhexan-2-yl)carbamateN-[(1S,3S,4S)-1-Benzyl-3-hydroxy-5-phenyl-4-aminopentyl]carbamic Acid tert-Butyl Ester(2S,3S,5S)-2-Amino-3-hydroxy-5-(tert-butyloxycarbonylamino)-1,6-diphenylhexaneN-[(1S,3S,4S)-4-Amino-3-hydroxy-5-phenyl-1-(phenylmethyl)pentyl]carbamic Acid 1,1-Dimethylethyl Ester