?-D-NeupAc-(2->?)-?-D-Galp-(1->?)-?-D-GalpNAc-(1->?)[?-D-NeupAc-(2->?)]-?-D-Galp-(1->?)-L-gro-?-D-manHep?-(1->?)[?-D-Glcp-(1->?)]-L-gro-?-D-manHep?6P-(1->?)-?-D-Kdop(2->