[4)-alpha-D-GlcpN2,6S2-(1->4)-alpha-L-IdopA-(1->4)-alpha-D-GlcpN6S-(1->4)-alpha-D-GlcpA-(1->4)-alpha-D-GlcpN2,6S2-(1->4)-alpha-L-IdopA-(1->4)-alpha-D-GlcpN2,6S2-(1->4)-alpha-L-IdopA-(1->]