?-L-IdopA2S-(1→?)-?-D-GalpNAc4S-(1→?)-?-D-GlcpA-(1→?)-?-D-GalpNAc6S-(1→?)-?-?-GlcpA-(1→?)-?-D-GalpNAc6S-(1→?)-?-L-Ido?A-(1→
