{1-cyclohexyl-2-[6-(6-fluoro-1H-indol-3-yl)-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester
methyl chloroformate
(2S,3S)-1-tert-butyl-2-methyl 3-hydroxypyrrolidine-1,2-dicarboxylate
(2S,3S)-1-(tert-butoxycarbonyl)-3-hydroxypyrrolidine-2-carboxylic acid
tert-butyl (2R,3S)-3-{[tert-butyl(dimethyl)silyl]oxy}-2-(hydroxymethyl)pyrrolidine-1-carboxylate
{1-cyclohexyl-2-[4-cyclopropanecarbonyl-6-(6-fluoro-1H-indol-3-yl)-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester
{1-cyclohexyl-2-[6-(6-fluoro-1H-indol-3-yl)-4-methanesulfonyl-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester
{1-cyclohexyl-2-[6-(6-fluoro-1H-indol-3-yl)-4-(2,2,2-trifluoro-acetyl)-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester
{2-[4-benzoyl-6-(6-fluoro-1H-indol-3-yl)-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-1-cyclohexyl-2-oxo-ethyl}-carbamic acid tert-butyl ester
[4-(2-tert-butoxycarbonylamino-2-cyclohexyl-acetyl)-3-(6-fluoro-1H-indol-3-yl)-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-acetic acid ethyl ester