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