alpha-D-Neup5Ac-(2->3)-beta-D-Galp-(1->3)[beta-D-Galp-(1->4)-beta-D-GlcpNAc6OS-(1->3)-beta-D-Galp-(1->4)-beta-D-GlcpNAc6OS-(1->6)]-?-D-GalNAc-ol
