title: Xanthones and ursolic acid from Swertia species.
mesh_terms: D010154:Pakistan; D010946:Plants, Medicinal / Q000032:analysis*; D012855:Sitosterols / Q000302:isolation & purification; D014315:Triterpenes / Q000302:isolation & purification*; D014970:Xanthines / Q000302:isolation & purification*
chemical_list: D012855:Sitosterols; D014315:Triterpenes; D014970:Xanthines