title: Precursor incorporation experiments in Papaver alkaloid biosynthesis. II. Papaver somniferum L.
mesh_terms: D003061:Codeine / Q000096:biosynthesis*; D005998:Glycine / Q000378:metabolism; D009020:Morphine / Q000096:biosynthesis*; D010207:Papaver / Q000378:metabolism*; D010649:Phenylalanine / Q000378:metabolism; D010946:Plants, Medicinal; D013797:Thebaine / Q000096:biosynthesis*; D014508:Urea / Q000378:metabolism
chemical_list: D013797:Thebaine; D010649:Phenylalanine; D009020:Morphine; D014508:Urea; D005998:Glycine; D003061:Codeine