(2R,4aR,6S,7R,8R,8aS)-2-phenyl-6-(p-tolylthio)-7-(((2,2,2-trichloroethoxy)carbonyl)amino)hexahydropyrano[3,2-d][1,3]dioxin-8-yl 4-oxopentanoate

((2R,3S,4R,5R,6S)-3-(((2S,3R,4S,5S,6R)-3-acetoxy-4,5-bis(benzyloxy)-6-((benzyloxy)methyl)tetrahydro-2H-pyran-2-yl)oxy)-4-((4-oxopentanoyl)oxy)-6-(p-tolylthio)-5-(((2,2,2-trichloroethoxy)carbonyl)amino)tetrahydro-2H-pyran-2-yl)methyl benzoate