[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch1][#C][C@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@@H1][Ring1][=Branch1][O][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is an N-acetyl-D-galactosamine having alpha-configuration at the anomeric centre. It has a role as an epitope. It is functionally related to an alpha-D-galactosamine."}]