title: The chemistry of Brazilian polygalaceae I. Xanthones from polygala spectabilis.
mesh_terms: D001938:Brazil; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal / Q000032:analysis*; D014966:Xanthenes / Q000302:isolation & purification
chemical_list: D014966:Xanthenes