[3R,4S,5S,8S,9R,10R,11R,12S]-9-[(tert-butyldimethylsilyl)oxy]-12-methoxy-3-[(4-methoxybenzyl)oxy]-2,4,8,10-tetramethyl-11-[(triethylsilyl)oxy]tetradec-13-en-5-ol-7-one