tributyl [(4R,5S,7S,8S,E)-5,7,9-tris(tert-butyldimethylsilyloxy)-1-methylene-3,4,8-trimethyl-2-nonen-1-yl]stannane

(5S,7S,8S)-7-((tert-butyldimethylsilyl)oxy)-2,2,3,3,8,11,11,12,12-nonamethyl-5-((R,E)-3-methyl-6-(trimethylsilyl)hex-3-en-5-yn-2-yl)-4,10-dioxa-3,11-disilatridecane