[3)-beta-D-ribosyl-(1->1)-D-ribitol-5-P-(O->]n
[3)-beta-d-ribosyl-(1->1)-d-ribitol-5-p-(o->]n
A biomacromolecule consisting of a backbone of β-<small>D</small>-ribosyl-(1→1)-<small>D</small>-ribitol-5-phosphate repeating units that are joined to each other by phosphodiester linkages.