3(S)-<<<1-(benzyloxycarbonyl)-2(S)-pyrrolidinyl>carbonyl>amino>-2-oxo-1-perhydroazepineacetamide

methyl 3(S)-<<<1-(benzyloxycarbonyl)-2(S)-pyrrolidinyl>carbonyl>amino>-2-oxo-1-perhydroazepineacetate

[(S)-3-((2R,3S)-3-Benzyloxycarbamoyl-2-isobutyl-hex-5-enoylamino)-2-oxo-azepan-1-yl]-acetic acid methyl ester

(R)-3-((S)-1-Methoxycarbonylmethyl-2-oxo-azepan-3-ylcarbamoyl)-octanoic acid

(R)-3-((S)-1-Methoxycarbonylmethyl-2-oxo-azepan-3-ylcarbamoyl)-octanoic acid tert-butyl ester