L-Prolinamide,2,2'-(((2S,5S)-1-(4-(1,1-dimethylethyl)phenyl)-2,5-pyrrolidinediyl)di-4,1-phenylene)bis(N-(methoxycarbonyl)-L-valy
dimethyl ([(2S,5S)-1-(4-tert-butylphenyl)pyrrolidine-2,5-diyl]bis{(4,1-phenylene)carbamoyl(2S)pyrrolidine-2,1-diyl[(2S)-3-methyl-1-oxobutane-1,2-diyl]})biscarbamate