title: Quaternary alkaloid of the bark of Alstonia venenata R. Br.
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000032:analysis*
chemical_list: D000470:Alkaloids; D010936:Plant Extracts