[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C][Branch1][Ring2][O][Ring1][=Branch1][O][O][O][O][C@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a disaccharide consisting of a beta-D-galactopyranose residue joined to a D-xylopyranose residue by a (1->4) glycosidic bond. Used to diagnose hypolactasia (lactose intolerance as a result of lactase deficiency) via presence of D-xylose after cleavage by lactase. It has a role as a diagnostic agent. It is functionally related to a beta-D-galactose and a D-xylopyranose."}]