beta-L-GlcpA-(1->4)-alpha-L-GlcpN2S-(1->4)-alpha-D-IdopA2S-(1->4)-alpha-L-GlcpN2S-(1->4)-alpha-D-IdopA2S-(1->4)-alpha-L-GlcpN2S-(1->4)-alpha-D-IdopA2S-(1->4)-alpha-L-GlcpN2S-(1->4)-alpha-D-IdopA2S-(1->4)-alpha-L-GlcpN2S-(1->4)-alpha-D-IdopA2S-(1->4)-alpha-L-GlcpN2S-(1->4)-alpha-D-IdopA-(1->4)-L-GlcNAc(?->