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