(4S,5R)-5-((S)-2,2-Dimethyl-[1,3]dioxolan-4-ylmethyl)-2-oxo-2λ4-[1,3,2]dioxathiolane-4-carboxylic acid ethyl ester

(2S,3R)-4-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,3-dihydroxy-butyric acid ethyl ester

(E)-(S)-5-(2-Bromo-2-methyl-propionyloxy)-6-(tert-butyl-dimethyl-silanyloxy)-hex-2-enoic acid ethyl ester