{3)-[beta-D-GlcpNAc-(1->4)]-alpha-D-Rhap-(1->3)-alpha-D-Rhap-(1->2)-alpha-D-Rhap-(1->2)-alpha-D-Rhap-(1->}n
{3)-[beta-d-glcpnac-(1->4)]-alpha-d-rhap-(1->3)-alpha-d-rhap-(1->2)-alpha-d-rhap-(1->2)-alpha-d-rhap-(1->}n
A branched polysaccharide derivative composed of a backbone of repeating <em>N</em>-acetyl-β-<small>D</small>-glucosaminyl-(1→4)-α-<small>D</small>-rhamnosyl-(1→3)-α-<small>D</small>-rhamnosyl-(1→2)-α-<small>D</small>-rhamnosyl-(1→2)-α-<small>D</small>-rhamnosyl units, joined by (1→3)-linkages, as shown.