[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][#Branch1][=C][C][C@@][Branch1][#C][O][C@H1][Ring1][=Branch1][C@@H1][Branch1][#Branch1][C@@H1][Branch1][Ring1][C][O][O][O][Branch1][=Branch1][C][=Branch1][C][=O][O][O][C@@H1][C@H1][Branch2][Branch1][=C][C@@H1][Branch2][Ring2][=Branch1][O][C@@H1][Branch2][Ring1][#C][C@@H1][Ring1][=Branch1][O][C@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][N][C][=Branch1][C][=O][C][C][O][O][C@@H1][C@H1][Branch1][=C][O][C@H1][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][O][C][O][O][O]"}, {"from": "gpt", "value": "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."}]