[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Branch1][#Branch2][C@@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][C][O][O][C@H1][C@@H1][Branch2][Ring2][=Branch1][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][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][O][O][O]"}, {"from": "gpt", "value": "The molecule is a linear amino trisaccharide conmprised of two (1->3)-linked beta-D-galactose residues linked (1->4) to an N-acetyl-beta-D-glucosamine residue at the reducing end. It has a role as an epitope. It is an amino trisaccharide and a glucosamine oligosaccharide."}]