[3)-alpha-D-Rhap-(1->3)-alpha-D-Rhap-(1->2)-alpha-D-Rhap-(1->]n
[3)-alpha-d-rhap-(1->3)-alpha-d-rhap-(1->2)-alpha-d-rhap-(1->]n
A polysaccharide composed of a backbone of repeating α-<small>D</small>-rhamnosyl-(1→3)-α-<small>D</small>-rhamnosyl-(1→2)-α-<small>D</small>-rhamnosyl units, joined by (1→3)-linkages.