1-((3aR,6aS)-5',5'-dimethyl-3,3a,4,6a-tetrahydro-1H-spiro[pentalene-2,2'-[1,3]dioxan]-5-yl)-2-tosyldiazene

(+)-(3'aS,4'R,5'R,6'aR)-4'-((3S,4S,E)-3-(tert-butyldimethylsilyloxy)-4-methyloct-1-en-6-ynyl)-5,5-dimethylhexahydro-1'H-spiro[[1,3]-dioxane-2,2'-pentalen]-5'-ol