ethyl (2E,4R,6S,7S,10S,12E)-4-(tert-butyldimethylsilyloxy)-10-(tert-butyldiphenylsilyloxy)-7-hydroxy-6-(trityloxymethyl)tetradeca-2,12-dienoate

ethyl (2E,4R,6S,7S,10S,12E)-4-(tert-butyldimethylsilyloxy)-10-(tert-butyldiphenylsilyloxy)-7-(methanesulfonyloxy)-6-(trityloxymethyl)tetradeca-2,12-dienoate