?-D-NeupAc-(2->?)-?-D-Galp-(1->?)-?-D-GalpNAc-(1->?)[?-D-NeupAc-(2->?)]-?-D-Galp-(1->?)-L-gro-?-D-manHepp-(1->?)[?-D-Glcp-(1->?)]-L-gro-?-D-manHep?6PEtn-(1->?)-D-Kdo(?->