trans-(5S)-5-hydroxy-p-toluenesulfonylethyl-2-hexenoate

(E)-(4R,5S)-5-((S)-3-Hydroxy-butyryloxy)-4-(4-methoxy-benzyloxy)-hex-2-enoic acid (E)-(S)-4-carboxy-1-methyl-but-3-enyl ester

(E)-(S)-5-Formyloxy-hex-2-enoic acid 2-(toluene-4-sulfonyl)-ethyl ester

trans-(4R,5S)-5-tert-butyldimethylsilyloxy-4-p-methoxybenzyloxy-2-hexenoic acid

(E)-(4R,5S)-5-(tert-Butyl-dimethyl-silanyloxy)-4-(4-methoxy-benzyloxy)-hex-2-enoic acid (E)-(S)-1-methyl-4-[2-(toluene-4-sulfonyl)-ethoxycarbonyl]-but-3-enyl ester