tert-butyl (S)-3-<(S)-1-carboxy-3-cyclohexylpropyl>amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzoxazepine-5-acetate

(S)-2-((S)-9-tert-Butoxycarbonylmethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-4-cyclohexyl-butyric acid butyl ester

(S)-tert-butyl (4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-3-yl)carbamate

2(S)-3-(2-aminophenoxy)-2-((tert-butoxycarbonyl)amino)propanoic acid

(S)-2-((tert-butoxycarbonyl)amino)-3-(2-nitrophenoxy)propanoic acid