(1R)-1-((4R,5S)-5-(hydroxy(phenyl)methyl)-2,2-dimethyl-1,3-dioxolan-4-yl)ethane-1,2-diol

(S)-benzyl 2-((4S,5S)-5-benzyl-2,2-dimethyl-1,3-dioxolane-4-carboxamido)-4-methylpentanoate

((2S,3R)-2-acetoxy-3-((tert-butoxycarbonyl)amino)-4-phenylbutanoyl)-L-leucine

ethyl (2S,3R)-2-hydroxy-4-phenyl-3-(tosylamino)butanoate