The molecule is a branched amino tetrasaccharide comprising an N-acetyl-D-glucosamine residue, a D-glucose residue and two L-glycero-D-manno-heptose residues, with linkages as shown.
N-[(2R,3R,4R,5S,6R)-2-[(2R,3S,4S,5S,6R)-6-[(1S)-1,2-dihydroxyethyl]-2-[(2R,3R,4R,5S,6S)-2-[(1S)-1,2-dihydroxyethyl]-5,6-dihydroxy-3-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-4-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide