[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an amino disaccharide comprising an N-acetyl-beta-D-glucosamine residue linked (1->3) to an N-acetyl-beta-D-galactosamine residue at the reducing end. It has a role as an epitope. It is an amino disaccharide, a glucosamine oligosaccharide and a galactosamine oligosaccharide."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring2][=Branch2][C@@H1][Branch2][Ring2][Ring2][C@H1][Branch2][Ring1][=C][O][C@H1][Ring1][=Branch1][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][O]"}]