(3S,4S)-tert-butyl (1-(3-amino-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl)-3,4-trans-4-{[tert-butyl(dimethyl)silyl]oxy}piperidin-3-yl)carbamate

benzyl (3aS,7aR)-2-oxohexahydro[1,3]oxazolo[4,5-c]pyridine-5(4H)-carboxylate

tert-butyl (3aS,7aR)-2-oxohexahydro[1,3]oxazolo[4,5-c]pyridine-3(2H)-carboxylate

tert-butyl (3aS,7aR)-5-(3-(5-((tert-butoxycarbonyl)amino)-2-(2,6-difluorophenyl)thiazole-4-carboxamido)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl)-2-oxohexahydrooxazolo[4,5-c]pyridine-3(2H)-carboxylate