1-Oxa-2,7-diazaspiro[4.4]non-2-ene-8-carboxamide,3-(3-chlorophenyl)-N-[(1S)-1-[2-(cyclopropylamino)-2-oxoacetyl]butyl]-7-[(2S)-3,3-dimethyl-1-oxo-2-[[[[(1S)-1-phenylethyl]amino]carbonyl]amino]butyl]-, (5S,8S)-