The molecule is a linear tetrasaccharide that consists of a 6-C-methyl-D-mannosyl residue at the non-reducing end and three D-mannosyl resides joined by sequential alpha-(1->2)-, alpha-(1->2)- and alpha-(1->3)-linkages. It is a deoxy oligosaccharide and a tetrasaccharide.
(2S,3S,4S,5R,6R)-4-[(2R,3S,4S,5S,6R)-3-[(2R,3S,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-[(1S)-1-hydroxyethyl]oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-(hydroxymethyl)oxane-2,3,5-triol