(βS,4S)-β,2,3-trimethyl-1,3-dioxolane-4-ethanol p-toluenesulfonate

(2S,3R)-5-benzyloxy-3-ethoxycarbonyl-2-hydroxy-3-methylpentanoic acid

(2S,3S)-3-Methyl-2-(1-methoxy-1-methylethoxy)-1,4-butandiol