6-[[2-(acetylthio)-1-oxo-3-phenylpropyl]amino]hexahydro-2,2-dimethyl-7-oxo-1H-azepine-1-acetic acid

[S-(R*,R*)]-Hexahydro-6-[[2-(acetylthio)-1-oxo-3-phenylpropyl]amino]-2,2-dimethyl-7-oxo-1H-azepine-1-acetic acid, ethyl ester

(S)-hexahydro-2,2-dimethyl-7-oxo-6-[(phenylmethoxy)carbonylamino]-1H-azepine-1-acetic acid 1,1-dimethylethyl ester

N-phthaloyl-L-ε-hydroxynorleucine

benzyl 5-formyl-2(S)-phthalimidopentanoate