[{"from": "human", "value": "Provide a description of this molecule. [C][C@H1][C@H1][Branch2][Branch1][#C][C@H1][Branch2][Branch1][#Branch2][C@@H1][Branch2][Branch1][Branch1][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@@H1][C@H1][Branch1][#C][C@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][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][N][C][=Branch1][C][=O][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is an amino trisaccharide in which an N-acetyl-D-galactosamine and an L-fucose link beta(1->3) and alpha(1->2) respectively to beta-D-galactose. It has a role as an epitope. It is an amino trisaccharide and a galactosamine oligosaccharide."}]