The molecule is a mannopentaose comprising alpha-D-mannopyranose, beta-D-mannopyranose, beta-D-mannopyranose, alpha-D-mannopyranose and D-mannopyranose resideus joined in sequence by (1->2) glycosidic linkages. It derives from a beta-D-Manp-(1->2)-beta-D-Manp-(1->2)-alpha-D-Manp-(1->2)-Manp.
(3S,4S,5S,6R)-3-[(2R,3S,4S,5S,6R)-3-[(2S,3S,4S,5S,6R)-3-[(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]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-(hydroxymethyl)oxane-2,4,5-triol