α-L-IdopA-(1→?)-β-D-GalpNAc4S-(1→?)-β-D-GlcpA-(1→?)-β-D-GalpNAc6S-(1→?)-?-?-GlcpA-(1→?)-β-D-Galp-(1→?)-β-D-Galp-(1→?)-?-D-Xyl-ol
