The administration of glycerol-2-C14 to nicotzana glazica plants leads to the formation of radioactive anabasine which has 387, of its activity located in the pyridine ring A systematic degradation is described whereby the distribution of activity around the pyridine ring can be determined The anabasine derived from glycerol-2-CI4 was found to have substantial activity at C-2, C-3, and C-5, with only low activity at C-4 and C-6 These results are ...