title: Dibutylbarbituric acid as an impurity in butobarbital tablets.
mesh_terms: D001463:Barbiturates / Q000032:analysis* / Q000592:standards; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D004340:Drug Contamination; D013607:Tablets
chemical_list: D001463:Barbiturates; D013607:Tablets