?-D-GlcpNAc-(1→?)-?-D-Manp-(1→?)[?-D-GlcpNAc-(1→?)-?-D-Manp-(1→?)]-α-D-Manp-(1→4)-?-D-GlcpNAc-(1→?)-?-D-GlcpNAc-(1→
