(4S)-triethylsilyloxy-(5S)-ethynyl-(7S)-iodomethyl-1,6-dioxa-spiro[2,5]octane

Acetic acid (Z)-(S)-3-{(2R,3R,5S,6S)-6-[(2E,4E)-5-((3S,4S,5S,7S)-7-iodomethyl-4-triethylsilanyloxy-1,6-dioxa-spiro[2.5]oct-5-yl)-3-methyl-penta-2,4-dienyl]-2,5-dimethyl-tetrahydro-pyran-3-ylcarbamoyl}-1-methyl-allyl ester

{(3S,4S,5S,7S)-5-[(1E,3E)-5-((2S,3S,5R,6R)-5-Azido-3,6-dimethyl-tetrahydro-pyran-2-yl)-3-methyl-penta-1,3-dienyl]-7-iodomethyl-1,6-dioxa-spiro[2.5]oct-4-yloxy}-triethyl-silane