[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring2][Ring2][C@@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][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][O][O]"}, {"from": "gpt", "value": "The molecule is an amino disaccharide composed of D-galactose and 2-acetamido-2-deoxy-beta-D-glucopyranosyl residues in (alpha-1->4) linkage. It has a role as an epitope. It is an amino disaccharide and a glucosamine oligosaccharide. It is functionally related to a N-acetyl-beta-D-glucosamine and an alpha-D-galactose."}]