title: Biosynthesis of the pyrrolopyrimidine nucleoside antibiotic, toyocamycin. VII. Origin of the pyrrole carbons and the cyano carbon.
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D002247:Carbon Isotopes
chemical_list: D000900:Anti-Bacterial Agents; D002247:Carbon Isotopes