[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a linear amino trisaccharide consisting of three N-acetyl-beta-D-glucosamine residues linked (1->4). It has a role as an epitope. It is an amino trisaccharide and a glucosamine oligosaccharide."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][=Branch1][Branch1][C@@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][C][O][O][C@H1][C@@H1][Branch2][Ring2][N][C@H1][Branch2][Ring2][#Branch1][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][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][N][C][=Branch1][C][=O][C][O]"}]