[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][#Branch1][O][C@@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][C][O][O][C@H1][C@@H1][Branch2][=Branch1][#Branch1][C@H1][Branch2][Ring2][Branch2][C@H1][Branch2][Ring2][Ring1][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][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][O][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][O][O]"}, {"from": "gpt", "value": "The molecule is a branched amino tetrasaccharide comprising a beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosamine disaccharide, to the galactosyl residue of which are (1->3)- and (1->6)-linked two N-acetyl-beta-D-glucosamine residues. It has a role as an epitope. It is an amino tetrasaccharide and a glucosamine oligosaccharide."}]