4-O-({poly[3-N-acetyl-beta-D-glucosaminyl-1-D-ribitylphosphonato]}-di{[2R]-1-glycerylphosphonato})-N-acetyl-beta-D-mannosaminyl-(1->4)-N-acetyl-alpha-D-glucosaminyl ditrans,octacis-undecaprenyl diphosphate polyanion