(2S,5S,6R)-5-(benzyloxy)-2-(((2R,3S,4S,4aR,6S,7R,8aS)-7-(benzyloxy)-6-((S)-4-(benzyloxy)butan-2-yl)-3,4-dihydroxy-4a-methyloctahydropyrano[3,2-b]pyran-2-yl)methyl)-6-((benzyloxy)methyl)-2-methyldihydro-2H-pyran-3(4H)-one