[{"from": "human", "value": "What can you tell me about this molecule? [C][C@H1][C@H1][Branch2][Ring2][#C][C@H1][Branch2][Ring2][#Branch2][C@@H1][Branch2][Ring1][S][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@H1][C@H1][Branch2][Ring1][Ring1][C@H1][Branch1][#C][O][C][Branch1][#Branch2][C@@H1][Ring1][=Branch1][N][C][=Branch1][C][=O][C][O][C][O][N][C][=Branch1][C][=O][C][O][O]"}, {"from": "gpt", "value": "The molecule is an amino disaccharide consisting of an N-acetyl-alpha-L-fucosaminyl residue linked (1->3) to an N-acetyl-alpha-D-fucosamine residue. It has a role as an epitope."}]