title: Biosynthesis of the Nicotiana alkaloids. XI. Investigation of tautomerism in N-methyl-delta-pyrrolinium chloride and its incorporation into nicotine.
mesh_terms: D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D002712:Chlorides; D009538:Nicotine / Q000096:biosynthesis*; D009952:Ornithine / Q000378:metabolism; D010947:Plants, Toxic; D011758:Pyrroles / Q000378:metabolism*; D014026:Nicotiana / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D002712:Chlorides; D011758:Pyrroles; D009538:Nicotine; D009952:Ornithine