(2R,3S)-methyl 2-((S)-1-acetoxy-2-methylpropyl)-3-(tert-butyldimethylsilyloxy)-5-oxopyrrolidine-2-carboxylate

(2R,5R)-1-aza-2-(tert-butyl)-5-methoxycarbonyl-6,8-dioxo-3-oxabicyclo[3.3.0]octane

(2R,4S)-2-tert-Butyl-3-ethoxycarbonylacetyl-4-methoxycarbonyl-1,3-oxazolidine

(+/-)-4-(acetamino)phenyl 4-methylphenyl sulfoxide

(R)-1,2,2-triphenyl-2-((trimethylsilyl)oxy)ethyl (2R,3S)-3-((4S,5S)-3-benzyl-4-(((tert-butyldimethylsilyl)oxy)methyl)-5-isopropyloxazolidin-4-yl)-3-hydroxy-2-methylpropanoate