The molecule is a branched amino pentasaccharide consisting of the linear sequence beta-D-Gal-(1->3)-beta-D-GalNAc-(1->4)-beta-D-Gal-(1->4)-beta-D-Glc having a Neu5Ac residue attached to the inner galactose via an alpha-(2->3) linkage. The oligosaccharide of ganglioside GM1. It has a role as an epitope.
(2S,4S,5R,6R)-5-acetamido-2-[(2R,3S,4R,5R,6S)-3-[(2S,3R,4R,5R,6R)-3-acetamido-5-hydroxy-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-5-hydroxy-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid