4-methoxybenzyl ((1R,2R)-1-((tert-butyldimethylsilyl)oxy)-1-(6-chloropyridin-3-yl)-6-(4-nitrophenyl)hex-5-yn-2-yl)carbamate
4-methoxybenzyl ((1R,2R)-1-((tert-butyldimethylsilyl)oxy)-1-(6-chloropyridin-3-yl)-6-(4-nitrophenyl)-5-oxohexan-2-yl)carbamate
(S)-4-benzyl-3-((R)-2-((S)-(6-chloropyridin-3-yl)((trimethylsilyl)oxy)methyl)hex-5-ynoyl)oxazolidin-2-one
(2S,5S)-tert-butyl 2-((R)-((tert-butyldimethylsilyl)oxy)(6-chloropyridin-3-yl)methyl)-5-(4-nitrobenzyl)pyrrolidine-1-carboxylate
4-methoxybenzyl ((1R,2R)-1-((tert-butyldimethylsilyl)oxy)-1-(6-chloropyridin-3-yl)hex-5-yn-2-yl)carbamate