title: Biosynthesis of porphyrins and related macrocycles. I. Synthesis of 14C-labelled pyrromethanes.
mesh_terms: D002247:Carbon Isotopes; D008697:Methane / Q000138:chemical synthesis; D011166:Porphyrins / Q000096:biosynthesis*; D011758:Pyrroles / Q000138:chemical synthesis*
chemical_list: D002247:Carbon Isotopes; D011166:Porphyrins; D011758:Pyrroles; D008697:Methane