derivative 35 carrying a 3-O-allyl protecting group at the Gal residue by reiterative glycosylation using the (N-phenyl)trifluoroacetimidate method. Decasaccharide 50 was used as a buildingblock in the solid-phasesynthesis of a MUC1-related glycopeptide. Synthetic glycopeptide was obtained through two acidic processes: cleavage from resin with reagent K at a lowered temperature and debenzylation with