title: Alkaloids of Tylophora. II. Structural studies.
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D007259:Infrared Rays; D007546:Isoquinolines / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D010944:Plants / Q000032:analysis; D013053:Spectrophotometry; D014466:Ultraviolet Rays
chemical_list: D000470:Alkaloids; D007546:Isoquinolines