((S)-7-{2-[(Benzyloxy-formyl-amino)-methyl]-3-phenyl-propionylamino}-8-oxo-7,8-dihydro-6H-5-oxa-9-aza-benzocyclohepten-9-yl)-acetic acid benzyl ester

(R)-2-((S)-9-Carboxymethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-5-ethyl-heptanoic acid ethyl ester; hydrochloride

4-[(S)-3-((S)-9-Benzyloxycarbonylmethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-3-ethoxycarbonyl-propyl]-piperidine-1-carboxylic acid benzyl ester

4-[(R)-3-((S)-9-Benzyloxycarbonylmethyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylamino)-3-ethoxycarbonyl-propyl]-piperidine-1-carboxylic acid benzyl ester

benzyl 3(S)-[1(R)-ethoxycarbonyl-3-cyclohexylpropyl]amino-4-oxo-2,3,4,5-tetrahydro-1,5-benzoxazepine-5-acetate