(5S,6S)-6-((E)-2-((4R,5R)-5-((R,Z)-2-((tert-butyldimethylsilyl)oxy)-4-iodobut-3-en-1-yl)-4-(2-hydroxyethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)vinyl)-5-ethyl-5,6-dihydro-2H-pyran-2-one

(5S,6S)-6-[(1E,3R,4R,6R,7Z)-3-[2-(allyloxycarbonylamino)ethyl]-6-tert-butyldimethylsiloxy-8-iodo-3,4-isopropylidenedioxy-1,7-octadienyl]-5-ethyl-5,6-dihydro-2H-pyran-2-one

(5S,6S)-6-[(1E,3R,4R,6R,7Z,9Z)-3-[2-(allyloxycarbonylamino)ethyl]-6-tert-butyldimethylsiloxy-3,4-dihydroxy-10-[(1R,3S)-3-[(6S)-methyloctanoyloxy]cyclohexyl]-1,7,9-decatrienyl]-5-ethyl-5,6-dihydro-2H-pyran-2-one