tert-butyl (S)-4-benzyl-2-((1S,2S)-3-(3,5-difluorophenyl)-1-hydroxy-2-(5-((R)-2-(methoxymethyl)pyrrolidine-1-carbonyl)nicotinamido)propyl)-3-oxopiperazine-1-carboxylate

tert-butyl (S)-4-benzyl-2-((1S,2S)-3-(3,5-difluorophenyl)-2-((S)-3-ethyl-2-oxo-1-propylimidazolidine-4-carboxamido)-1-hydroxypropyl)-3-oxopiperazine-1-carboxylate

tert-butyl (S)-4-benzyl-2-((1S,2S)-3-(3,5-difluorophenyl)-1-hydroxy-2-((S)-3-isopropyl-2-oxo-1-propylimidazolidine-4-carboxamido)propyl)-3-oxopiperazine-1-carboxylate

tert-butyl (S)-4-benzyl-2-((1S,2S)-3-(3,5-difluorophenyl)-1-hydroxy-2-(2-oxo-1,3-dipropylhexahydropyrimidine-5-carboxamido)propyl)-3-oxopiperazine-1-carboxylate

tert-butyl (R)-2-((1S,2S)-3-(3,5-difluorophenyl)-1-hydroxy-2-(3-((R)-2-(methoxymethyl)pyrrolidine-1-carbonyl)-5-methylbenzamido)propyl)-4-((1-methyl-1H-imidazol-4-yl)sulfonyl)piperazine-1-carboxylate