[{"from": "human", "value": "Describe this molecule. [C][Branch2][Ring1][=C][C@@H1][C@@H1][Branch2][Ring1][Branch2][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a monosaccharide sulfate that is beta-D-galactose bearing a single sulfo substituent at position 3; sulfatide in which both acyl chains have been removed by treatment with ceramide glycanase. It has a role as an epitope. It is functionally related to a beta-D-galactose."}]