2-Acetamido-3-O-(2,3,4,6-tetra-O-acetyl-b-D-galactopyranosyl)-2-deoxy-D-glucopyranose is a custom synthesis of an oligosaccharide. It is fluorinated at the 2 position and methylated on the 3 position. This glycosylation product has been shown to be resistant to degradation by enzymes that hydrolyze glycosidic bonds.