(3aR,7aR)-3-((S)-1-Phenyl-ethyl)-hexahydro-benzooxazol-2-one

(4R,5R)-(N-propionyl)hexahydrobenzoxazolidin-2-one

[(1S,2S)-2-(2-{(1S,2S)-2-[(R)-2-((1S,2S)-2-Benzyloxycarbonylamino-cyclohexyloxy)-3-phenyl-propionylamino]-cyclohexyloxy}-acetylamino)-cyclohexyloxy]-acetic acid tert-butyl ester

(4aS,8aS,1'S)-N-(1'-phenyl)-ethyl-4-oxa-perhydrochinolin-2-on

(4aS,8aS)-N-carboxybenzyl-4-oxa-perhydrochinolin-2-on