D-Glucose, O- beta-D-galactopyranosyl-(1-3)-O-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1-3)-O-(O-beta-D-galactopyranosyl-(1-4)-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1-6))-O-beta-D-galactopyranosyl-(1-4)-