The molecule is a glycoside consisting of D-ribitol having a alpha-D-glucosyl-(1->3)-alpha-D-glucosyl-(1->3)-alpha-L-rhamnosyl moiety attached at the 3-position. It has a role as a hapten. It is a glycoside and a tetrasaccharide. It derives from a ribitol.
(2S,4R)-3-[(2S,3R,4R,5S,6S)-4-[(2R,3R,4S,5R,6R)-3,5-dihydroxy-6-(hydroxymethyl)-4-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,5-dihydroxy-6-methyloxan-2-yl]oxypentane-1,2,4,5-tetrol