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