?-D-Neup5Ac-(2→?)-?-D-Neup5Ac-(2→?)-?-D-Galp-(1→?)[?-D-Neup5Ac-(2→?)-?-D-Neup5Ac-(2→?)]-?-D-GlcpNAc-(1→?)-?-D-Galp-(1→?)-?-D-Glcp-(1→
