Oxacyclododec-9-en-2-one,8-(acetyloxy)-12-[(1E,3E)-1,5-dimethyl-6-[3-[1-methyl-2-[(triethylsilyl)oxy]butyl]oxiranyl]-5-[(triethylsilyl)oxy]-1,3-hexadienyl]-7-hydroxy-7,11-dimethyl-4-[(triethylsilyl)oxy]-, (9E)-