The molecule is a mannopentaose comprised of alpha-D-mannose and beta-D-mannose residues linked (1->6), to the alpha-D-mannose residue of which are linked (1->3) and (1->6) two further alpha-D-mannose residues, while to the beta-D-mannose residue is (1->3)-linked a fourth alpha-D-mannose. It has a role as an epitope.
(2S,3S,4S,5S,6R)-2-[[(2R,3R,4S,5S,6S)-3,5-dihydroxy-4-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-6-[[(2R,3R,4S,5S,6R)-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]-6-(hydroxymethyl)oxane-3,4,5-triol