?-D-Neup5Gc-(2→?)-?-D-GalpNAc-(1→?)-?-D-GlcpNAc-(1→?)-?-D-Manp-(1→?)[?-D-Neup5Gc-(2→?)-?-D-GalpNAc-(1→?)-?-D-GlcpNAc-(1→?)-?-D-Manp-(1→?)]-?-D-Manp-(1→?)-?-D-GlcpNAc-(1→?)-?-D-GlcpNAc-(1→
