(2R,3S,5R)-2-((1S,2R)-3-Benzyloxy-1-iodo-2-methyl-propyl)-3-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-diphenyl-silanyloxymethyl)-tetrahydro-furan

(E)-5-((2R,3aS,3''R,5R,5'R,6S,6''S,7aS)-2-(((tert-butyldiphenylsilyl)oxy)methyl)-6-methyl-3''-((triethylsilyl)oxy)dodecahydrodispiro[furo[3,2-b]pyran-5,2'-furan-5',2''-pyran]-6''-yl)pent-4-en-1-yl pivalate

tert-butyl(((2R,3aS,3''R,5R,5'R,6S,6''S,7aS)-6-methyl-3''-((triethylsilyl)oxy)-6''-vinyldodecahydrodispiro[furo[3,2-b]pyran-5,2'-furan-5',2''-pyran]-2-yl)methoxy)diphenylsilane