(5R,6R)-6-((R)-1-((tert-Butyldimethylsilyl)oxy)allyl)-2,2,3,3,12,12,13,13-octamethyl-5-(prop-2-yn-1-yl)-4,7,11-trioxa-3,12-disilatetradecane 1g

(5R,6R)-6-((R)-1-((tert-Butyldimethylsilyl)oxy)allyl)-2,2,3,3,12,12,13,13-octamethyl-5-(prop-2-yn-1-yl)-4,7,11-trioxa-3,12-disilatetradecane 1g