title: Biosynthesis of the Nicotiana alkaloids. XII. The incorporation of alpha- and delta-N-methylornithine into the pyrrolidine ring of nicotine.
mesh_terms: D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D009538:Nicotine / Q000096:biosynthesis*; D009952:Ornithine / Q000378:metabolism*; D010947:Plants, Toxic; D011759:Pyrrolidines; D014026:Nicotiana / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D011759:Pyrrolidines; D009538:Nicotine; D009952:Ornithine