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Target molecule and synthetic strategy. A) A highly branched hexasaccharide fragment isolated from F. tularensis LVS lipopolysaccharide, target β-d-Man-(1→4)-α-d-Man disaccharide highlighted in red. B) Intramolecular aglycon delivery through acetal tethering. C) 4,6-benzylidene mediated α-triflate formation followed by SN2-like displacement.
