{(2S,4S,6R)-4-(tert-butyldiphenylsilanyloxy)-6-[(2S)-3-((2R,3S,6S)-6-((2R,3E)-2-hydroxy-6-methylhept-3-enyl)-3-methyltetrahydro-2H-pyran-2-yl)-2-methoxypropyl]tetrahydro-2H-pyran-2-yl}acetonitrile