title: Paper chromatographic method for detecting phenethicillin contamination in drugs.
mesh_terms: D002626:Chemistry, Pharmaceutical; D002854:Chromatography, Paper; D010404:Penicillin V / Q000031:analogs & derivatives*; D010406:Penicillins
chemical_list: D010406:Penicillins; D010404:Penicillin V