The molecule is a glycoside comprising glucose in (1->3) linkage with rhamnose, in turn linked (1->3) to D-ribitol. It has a role as a hapten. It is a glycoside and a trisaccharide. It derives from a ribitol.
(2R,4S)-3-[(2S,3R,4R,5S,6S)-3,5-dihydroxy-6-methyl-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxypentane-1,2,4,5-tetrol