(3aR,6R,7S,7aR)-6-((Z)-4-tert-butyldimethylsilyloxy-2-iodobut-2-enyl)-7-triethylsilyloxy-tetrahydro-2,2-dimethyl-3aH-[1,3]dioxolo[4,5-c]pyran

(E)-(S)-2-tert-Butoxycarbonylamino-6-(tert-butyl-dimethyl-silanyloxy)-4-((3aR,6R,7S,7aR)-2,2-dimethyl-7-triethylsilanyloxy-tetrahydro-[1,3]dioxolo[4,5-c]pyran-6-ylmethyl)-hex-4-enoic acid methyl ester