tert-butyl ((3R,4R,5S)-1-(3-(3-amino-7-ethylquinoline-2-carboxamido)pyridin-4-yl)-4-((tert-butyldimethylsilyl)oxy)-5-methylpiperidin-3-yl)carbamate

tert-butyl ((3R,4R,5S)-1-(3-(5-((tert-butoxycarbonyl)amino)-2-(2,6-difluorophenyl)thiazole-4-carboxamido)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl)-4-((tert-butyldimethylsilyl)oxy)-5-methylpiperidin-3-yl)carbamate

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

tert-butyl [4-({[4-((3R,4R,5S)-3-[(tert-butoxycarbonyl)amino]-4-{[tert-butyl(dimethyl)silyl]oxy}-5-methylpiperidin-1-yl)-2,3-dihydrofuro[2,3-b]pyridin-5-yl]amino}carbonyl)-2-(2,6-difluorophenyl)-1,3-thiazol-5-yl]carbamate