title: Biosynthetic conversion of thebaine to codeine.
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism; D002247:Carbon Isotopes; D003061:Codeine / Q000096:biosynthesis*; D010207:Papaver / Q000378:metabolism*; D010946:Plants, Medicinal; D013797:Thebaine / Q000378:metabolism*
chemical_list: D002247:Carbon Isotopes; D002245:Carbon Dioxide; D013797:Thebaine; D003061:Codeine