[1,1-Dimethyl-2-((R)-3-phenyl-1-{[2'-(1H-tetrazol-5-yl)-biphenyl-4-ylmethyl]-carbamoyl}-propylcarbamoyl)-ethyl]-carbamic acid benzyl ester

2-((R)-1-tert-Butoxycarbonylamino-3-phenyl-propyl)-oxazole-4-carboxylic acid methyl ester

(2R)-N-amino-2-[(tert-butoxy)carbonylamino]-4-phenylbutanamide

{(R)-4-[(R)-1-(Benzooxazol-2-yl-hydroxy-methyl)-3-phenyl-propylcarbamoyl]-4-tert-butoxycarbonylamino-butyl}-carbamic acid tert-butyl ester

(R)-2-Amino-4-phenyl-N-quinolin-6-yl-butyramide