The molecule is a branched mannopentaose comprised of a linear tetrasaccharide unit of D-mannose residues linked sequentially alpha(1->2), alpha(1->6) and alpha(1->6), to the residue at the reducing end is also linked alpha(1->2) a fifth D-mannose residue.
(2R,3S,4S,5S,6R)-2-[(3S,4S,5S,6R)-6-[[(2S,3S,4S,5S,6R)-6-[[(2S,3S,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxymethyl]-3,4,5-trihydroxyoxan-2-yl]oxymethyl]-2,4,5-trihydroxyoxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol