(2'S,3aS,4S,4'R,5'S,7aR)-2'-((benzyloxy)methyl)-4',5'-dihydroxyoctahydro-2H,2'H-spiro[benzofuran-4,3'-furan]-2-one

(2R,3R,4R,5S)-4-(2-hydroxyethyl)-2,3-(isopropylidenedioxy)-5-<(1R)-1,2-(isopropylidenedioxy)ethyl>-4-vinyltetrahydrofuran

(2R,3R,4R,5S)-4-(2-Iodoethyl)-2,3-(isopropylidenedioxy)-5-<(1R)-1,2-(isopropylidenedioxy)ethyl>-4-vinyltetrahydrofuran

(2R,3R,4R,5S)-2,3-(Isopropylidenedioxy)-5-<(1R)-1,2-(isopropylidenedioxy)ethyl>-4-<3-(methoxycarbonyl)propyl>-4-vinyltetrahydrofuran

(2R,3R,4R,5S)-2,3-(Isopropylidenedioxy)-5-<(1R)-1,2-(isopropylidenedioxy)ethyl>-4-<4-(tert-butyldimethylsilyloxy)butyl>-4-vinyltetrahydrofuran