1-((2S,3S,5R,6S)-5-(benzyloxy)-6-((S)-4-(benzyloxy)butan-2-yl)-3-((tert-butyldimethylsilyl)oxy)-2-methyltetrahydro-2H-pyran-2-yl)-4-((2S,3R,5S,6R)-5-(benzyloxy)-6-((benzyloxy)methyl)-3-((4-methoxybenzyl)oxy)-2-methyltetrahydro-2H-pyran-2-yl)but-2-yn-1-one

methyl (S)-3-((2R,4aR,6S,7R,8aS)-7-(benzyloxy)-4a-methyl-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-6-yl)butanoate