The molecule is an amino tetrasaccharide comprising a linear chain of three alpha-D-mannose and one N-acetyl-alpha-D-glucosamine resides joined in sequence by (1->2), (1->6) and (1->2) glycosidic linkages.
(2R,3S,4S,5S,6R)-2-[(2S,3S,4S,5S,6R)-2-[[(2R,3S,4S,5S,6R)-6-[(2R,3S,4R,5R,6S)-5-amino-4,6-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methoxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol