[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an amino disaccharide that consists of N-acetyl-beta-D-glucosamine having a 3-sulfated beta-D-galactosyl residue attached at position 4. It has a role as an epitope. It is an amino disaccharide and an oligosaccharide sulfate."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring2][=N][C@@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][C][O][O][C@H1][C@@H1][Branch2][Ring1][=Branch2][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][O][O]"}]