[4)-D-GlcpA-(1->4)-D-GlcpNAc-(1->]n
[4)-d-glcpa-(1->4)-d-glcpnac-(1->]n
A polysaccharide derivative composed of a backbone of repeating <small>D</small>-glucuronosyl-(1→4)-<em>N</em>-acetyl-<small>D</small>-glucosamine units joined by (1→4)-linkages.