O-beta-D-galactofuranosyl-(1->3)-O-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1->3)-O-beta-D-galactopyranosyl-(1->4)-O-2-(acetylamino)-2-deoxy-beta-D-glucopyranosyl-(1->3)-O-beta-D-galactopyranosyl-(1->4)- D-Glucose