tert-butyl 3-(2-(3-((R)-1-((R)-1,1-dimethylethylsulfinamido)ethyl)-5,6-dihydropyridin-1(2H)-yl)ethyl)-2-(2-ethoxy-2-oxoethyl)-1H-indole-1-carboxylate

ethyl (R)-2-(3-(2-(5-(1-((tert-butoxycarbonyl)amino)ethyl)-3,6-dihydropyridin-1(2H)-yl)ethyl)-1H-indol-2-yl)acetate

tert-butyl (R)-3-(2-(3-(1-(tert-butoxycarbonylamino)ethyl)-5,6-dihydropyridin-1(2H)-yl)ethyl)-2-(2-ethoxy-2-oxoethyl)-1H-indole-1-carboxylate