[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Branch2][Ring2][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][Ring2][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][Branch2][Ring1][Ring1][O][C@H1][Branch1][=C][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][N][C][=Branch1][C][=O][C][O][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is a branched amino tetrasaccharide comprised of a trisaccharide chain of N-acetyl-alpha-neuraminic acid, beta-D-galactose and N-acetyl-beta-D-glucosamine residues linked sequentially (2->3) and (1->4), to the galactose residue of which is also linked (1->4) an N-acetyl-beta-L-galactosamine residue. It has a role as an epitope. It is an amino tetrasaccharide, a glucosamine oligosaccharide and a galactosamine oligosaccharide."}]