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