(S)-4-((tert-butyldimethylsilyl)oxy)-1-(trimethylsilyl)pent-1-yn-3-one

(4R,5S)-(E)-5-(t-butyl(dimethyl)silyloxy)-4-(β-methoxyethoxy)methoxy-2-hexenoic acid

methyl (S)-3-(4-methoxybenzyloxy)butanoate

(3R,4S)-3-(4-methoxybenzyloxy)-1-penten-4-yl (3S)-3-hydroxybutanoate

5-(tert-butyl-dimethyl-silanyloxy)-4-(2-methoxy-ethoxymethoxy)-hex-2-enoic acid ethyl ester