The molecule is an amino tetrasaccharide comprising three residues of D-mannose and one of N-acetyl-alpha-D-glucosamine, in a linear sequence, all joined by beta-(1->3)-linkages.
N-[(2S,3R,4R,5S,6R)-4-[(2S,3S,4S,5R,6R)-4-[(2R,3S,4S,5R,6R)-3,5-dihydroxy-6-(hydroxymethyl)-4-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide