The molecule is a branched thirteen-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 three glucosamine residues, one of which is acetylated and another is at the reducing end. The unit constitutes the core oligosaccharide structure of enterobacterial lipopolysaccharide obtained from E. coli strain F576.
(2R,4R,5R,6R)-2-[(2R,4R,5R,6R)-5-[(2S,3S,4R,5R,6R)-4-[(2R,3S,4R,5R,6R)-4-[(2R,3R,4S,5R,6R)-4-[(2R,3R,4S,5S,6R)-3-[(2R,3R,4S,5S,6R)-3-[(2R,3R,4R,5S,6R)-3-acetamido-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,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-6-[(1S)-2-[(2S,3S,4S,5S,6R)-6-[(1S)-1,2-dihydroxyethyl]-3,4,5-trihydroxyoxan-2-yl]oxy-1-hydroxyethyl]-3-hydroxy-5-phosphonooxyoxan-2-yl]oxy-6-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-5-phosphonooxyoxan-2-yl]oxy-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]oxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylic acid