O-(2-acetamido-2-deoxygalactopyranosyl)(1-4)-O-galactopyranosyl(1-3)-2-acetamido-2-deoxygalactopyranose
o-(2-acetamido-2-deoxygalactopyranosyl)(1-4)-o-galactopyranosyl(1-3)-2-acetamido-2-deoxygalactopyranose