(4S,5S)-4-Benzyl-5-[(2S,5'S)-5'-benzyl-4-((R)-1-carbamoyl-2-phenyl-ethyl)-2-isobutyl-3,4'-dioxo-2,3,4',5'-tetrahydro-1H,1'H-[2,3']bipyrrolyl-5'-ylmethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

(2S,5'S)-5'-Benzyl-5'-((4S,5S)-4-benzyl-3-tert-butoxycarbonyl-2,2-dimethyl-oxazolidin-5-ylmethyl)-4-((R)-1-carboxy-2-phenyl-ethyl)-2-isobutyl-3,4'-dioxo-2,3,4',5'-tetrahydro-[2,3']bipyrrolyl-1,1'-dicarboxylic acid diallyl ester

diallyl (2S,5'S)-5'-benzyl-5'-(((4S,5S)-4-benzyl-3-(tert-butoxycarbonyl)-2,2-dimethyloxazolidin-5-yl)methyl)-4-((R)-1-((tert-butyldimethylsilyl)oxy)-3-phenylpropan-2-yl)-2-isobutyl-3,4'-dioxo-2,3,4',5'-tetrahydro-1H,1'H-[2,3'-bipyrrole]-1,1'-dicarboxylate