(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
(2R)-[2-benzyloxycarbonylamino-(1S)-(6-fluoro-1H-indol-3-yl)-ethyl]-(3S)-(tert-butyl-dimethyl-silanyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester
(2R)-[2-benzyloxycarbonylamino-(1S)-(6-fluoro-1H-indol-3-yl)-ethyl]-(3S)-methanesulfonyloxy-pyrrolidine-1-carboxylic acid tert-butyl ester
{2-[4-acetyl-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]pyrrole-1-carboxylic acid methyl ester
{1-cyclohexyl-2-[6-(6-fluoro-1H-indol-3-yl)-4-pyrimidin-2-yl-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester
{2-[4-(2-tert-butoxycarbonylamino-2-cyclohexyl-acetyl)-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-amino-2-cyclohexyl-acetyl)-3-(6-fluoro-1H-indol-3-yl)-hexahydro-pyrrolo[3,2-b]pyrrole-1-carboxylic acid methyl ester