The molecule is a branched tetrasaccharide derivative consisting of beta-L-rhamnose having a 3-O-phosphono-beta-D-glucosyl-(1->4)-[alpha-L-rhamnosyl-(1->2)]-beta-D-galactosyl moiety attached at the 4-position. It is an oligosaccharide phosphate and a tetrasaccharide derivative.
[(2S,3R,4S,5R,6R)-3,5-dihydroxy-2-[(2R,3R,4S,5R,6S)-4-hydroxy-2-(hydroxymethyl)-5-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxy-6-[(2S,3R,4S,5R,6S)-4,5,6-trihydroxy-2-methyloxan-3-yl]oxyoxan-3-yl]oxy-6-(hydroxymethyl)oxan-4-yl] dihydrogen phosphate