(1S,2S,3R,5S)-2-((tert-butoxycarbonyl)amino)-2,6,6-trimethylbicyclo[3.1.1]heptane-3-carboxylic acid

benzyl (S)-2-({(1S,2S,3R,5S)-3-{[(S)-1-methoxy-1-oxo-3-phenylpropan-2-yl]carbamoyl}-2,6,6-trimethylbicyclo[3.1.1]heptan-2-yl}carbamoyl)pyrrolidine-1-carboxylate

methyl (S)-2-{(1S,2S,3R,5S)-2-amino-2,6,6-trimethylbicyclo[3.1.1]heptan-3-ylcarboxamido}-3-phenylpropanoate

benzyl (S)-2-({(1S,2S,3R,5S)-3-{[(R)-3,3-dimethylbutan-2-yl]carbamoyl}-2,6,6-trimethylbicyclo[3.1.1]heptan-2-yl}carbamoyl)pyrrolidine-1-carboxylate