2,7,15,17-Octadecatetraenal,13-[(aminocarbonyl)oxy]-5,11-bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]-10-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4,6,8,12,14-pentamethyl-, (2Z,4S,5S,6S,7Z,10R,11R,12R,13S,14S,15Z)-