title: Bicyclic enamines. VI. Synthesis of gentianadine and the alkaloidal indoloquinolizidine skeleton.
mesh_terms: D000470:Alkaloids; D000588:Amines / Q000138:chemical synthesis*; D002845:Chromatography; D006358:Hot Temperature; D007783:Lactones / Q000032:analysis; D013058:Mass Spectrometry; D008722:Methods; D008745:Methylation; D009539:Nicotinic Acids / Q000032:analysis; D010946:Plants, Medicinal / Q000138:chemical synthesis; D011807:Quinolizines / Q000138:chemical synthesis*; D013053:Spectrophotometry
chemical_list: D000470:Alkaloids; D000588:Amines; D007783:Lactones; D009539:Nicotinic Acids; D011807:Quinolizines