The molecule is a branched twelve-membered oligosaccharide phosphate consisting of two galactose residues, three glucose residues, two 3-deoxy-D-manno-oct-2-ulosonic acid residues, three L-glycero-alpha-D-manno-heptose residues and two glucosamine residues, one of which is at the reducing end. The unit constitutes the core oligosaccharide structure of enterobacterial lipopolysaccharide obtained from Salmonella enterica sv. Minnesota.
(2R,4R,5R,6R)-2-[(2R,4R,5R,6R)-2-[[(2R,3S,4R,5R,6R)-5-amino-6-[[(2R,3S,4R,5R,6R)-5-amino-3,4-dihydroxy-6-phosphonooxyoxan-2-yl]methoxy]-4-hydroxy-3-phosphonooxyoxan-2-yl]methoxy]-2-carboxy-6-[(1R)-1,2-dihydroxyethyl]-5-[(2S,3S,4R,5R,6R)-6-[(1S)-1,2-dihydroxyethyl]-4-[(2R,3S,4R,5R,6R)-6-[(1S)-2-[(2S,3S,4S,5S,6R)-6-[(1S)-1,2-dihydroxyethyl]-3,4,5-trihydroxyoxan-2-yl]oxy-1-hydroxyethyl]-4-[(2R,3R,4S,5R,6R)-4-[(2R,3R,4S,5R,6R)-3-[(2R,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,5-dihydroxy-6-[[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxy-3-hydroxy-5-phosphonooxyoxan-2-yl]oxy-3-hydroxy-5-phosphonooxyoxan-2-yl]oxyoxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylic acid