β-D-GlcpNAc-(1→2)-α-D-Manp-(1→3)[β-D-GlcpNAc-(1→2)-α-D-Manp-(1→6)][β-D-Xylp-(1→2)]-α-D-Manp-(1→4)-β-D-GlcpNAc-(1→4)-?-D-GlcpNAc-(1→
