?-D-NeupAc-(2->?)-?-D-NeupAc-(2->?)-?-D-NeupAc-(2->?)-?-D-NeupAc-(2->?)[?-D-GalpNAc-(1->?)-?-D-Galp-(1->?)-?-D-Galp-(1->?)]-?-D-GalpNAc(1->