2(5H)-Furanone, 4-(3,4-difluoro-2-methoxyphenyl)-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-3-methyl-, (5S)-

Methyl cis-3,3-difluoro-2,3A,4,5,6,6A-hexahydro-1H-cyclopenta[B]pyrrole-5-carboxylate

cis-1-Benzyloxycarbonyl-3,3-difluoro-2,3A,4,5,6,6A-hexahydrocyclopenta[B]pyrrole-5-carboxylic acid

Benzyl cis-3,3-difluoro-5-oxo-3A,4,6,6A-tetrahydro-2H-cyclopenta[B]pyrrole-1-carboxylate

Benzyl cis-3,3-difluoro-5-hydroxy-2,3A,4,5,6,6A-hexahydrocyclopenta[B]pyrrole-1-carboxylate

Tert-butyl cis-6-hydroxy-2,3,3A,5,6,6A-hexahydro-1H-pyrrolo[3,2-B]pyrrole-4-carboxylate

3-[(8AS)-7-Tert-butoxycarbonyl-3-thioxo-5,6,8,8A-tetrahydro-1H-imidazo[1,5-A]pyrazin-2-YL]-2,2-dimethyl-propanoic acid

1-[[(8AR)-7-Tert-butoxycarbonyl-3-thioxo-5,6,8,8A-tetrahydro-1H-imidazo[1,5-A]pyrazin-2-YL]methyl]cyclopropanecarboxylic acid

1-[[(8AS)-7-Tert-butoxycarbonyl-3-thioxo-5,6,8,8A-tetrahydro-1H-imidazo[1,5-A]pyrazin-2-YL]methyl]cyclopropanecarboxylic acid

Ethyl (8R,8AS)-2-methyl-3-thioxo-1,5,6,7,8,8A-hexahydroimidazo[1,5-A]pyrazine-8-carboxylate

O2-Tert-butyl O5-ethyl 1,3,4,4A,5,6,7,7A-octahydrocyclopenta[C]pyridine-2,5-dicarboxylate