Cyclopentanone.2-[[3-[[(1.1-dimethylethyl)dimethylsilyl]oxy]phenyl]methyl]-4-[(tetrahydro-2H-pyran-2-yl)oxy]-3-[(1E.3S)-3-[(tetrahydro-2H-pyran-2-yl)oxy]-1-octen-1-yl]-.(2R.3R.4R)-