alpha-D-GlcpN2S-(1->4)-beta-D-GlcpA-(1->4)-alpha-D-GlcpNAc-(1->4)-[4)-beta-D-GlcpA-(1->4)-alpha-D-GlcpNAc-(1->]-beta-D-GlcpA-(1->3)-beta-L-Galp-(1->3)-beta-L-Galp-(1->4)-beta-D-Xylp(1->