(S)-2-((S)-9-Carboxymethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-4-cyclohexyl-butyric acid benzyl ester; hydrochloride

4-[(S)-6-((S)-9-tert-Butoxycarbonylmethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-6-ethoxycarbonyl-hexyl]-piperidine-1-carboxylic acid benzyl ester

tert-butyl 3(S)-[6(1-benzyloxycarbonyl-4-piperidyl)-1(R)-ethoxycarbonylhexyl]amino-4-oxo-2,3,4,5 -tetrahydro-1,5-benzoxazepine-5-acetate

tert-butyl 3(S)-[7-(1-benzyloxycarbonyl-4-piperidyl)-1(R)-ethoxycarbonylheptyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzoxazepine-5-acetate

4-[(S)-7-((S)-9-tert-Butoxycarbonylmethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-7-ethoxycarbonyl-heptyl]-piperidine-1-carboxylic acid benzyl ester