(E)-1-[(2S,5S,6R)-6-((S)-2-Methoxy-3-{(2R,4S,6S)-6-[2-(4-methoxy-benzyloxy)-ethyl]-4-triisopropylsilanyloxy-tetrahydro-pyran-2-yl}-propyl)-5-methyl-tetrahydro-pyran-2-yl]-6-methyl-hept-3-en-2-one