title: Extraction of morphine enhanced by addition of N-methyl-3-piperidyl-(N'N')-diphenylcarbamate.
mesh_terms: D002219:Carbamates; D002247:Carbon Isotopes; D002251:Carbon Tetrachloride; D055598:Chemical Phenomena; D002621:Chemistry; D002725:Chloroform; D002855:Chromatography, Thin Layer
chemical_list: D002219:Carbamates; D002247:Carbon Isotopes; D002725:Chloroform; D002251:Carbon Tetrachloride