SMILES: CC(=O)N[C@@H]1[C@H](C[C@@](O[C@H]1[C@@H]([C@@H](CO)O)O)(C(=O)O)O[C@@H]2[C@H]([C@@H](O[C@@H]([C@@H]2O[C@H]3[C@@H]([C@H]([C@H]([C@H](O3)CO)O)O)NC(=O)C)CO)O[C@@H]4[C@H](O[C@H]([C@@H]([C@H]4O)O)O)CO)O)O
Description: The molecule is a branched amino tetrasaccharide consisting of the linear sequence beta-D-GalNAc-(1->4)-beta-D-Gal-(1->4)-beta-D-Glc having a Neu5Ac residue attached to the galactose via an alpha-(2->3) linkage. Corresponds to the carbohydrate portion of ganglioside GM2. It has a role as an epitope. It is an amino tetrasaccharide and a glucosamine oligosaccharide.