(E)-(S)-4-(tert-Butyl-dimethyl-silanyloxy)-3-methyl-5-((R)-2,2,5,5-tetramethyl-[1,3]dioxolan-4-yl)-pent-2-en-1-ol

(R)-8-((3aR,5S,6aR)-2,2-Dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-8-hydroxy-oct-5-ynoic acid methyl ester