?-D-GalpNAc?S-(1→?)-?-D-GlcpNAc-(1→?)-?-D-Manp-(1→?)[?-D-GlcpNAc-(1→?)-?-D-Manp-(1→?)]-?-D-Manp-(1→?)-?-D-GlcpNAc-(1→?)-?-D-Glc?NAc-(1→
