title: Spectrophotometric determination of dipyrone, phenylbutazone and oxyphenbutazone by their hydrolysis and Schiff base formation with 4-dimethylaminobenzaldehyde.
mesh_terms: D000632:Aminopyrine / Q000031:analogs & derivatives*; D001547:Benzaldehydes; D055598:Chemical Phenomena; D002621:Chemistry; D004177:Dipyrone / Q000032:analysis*; D006868:Hydrolysis; D010113:Oxyphenbutazone / Q000032:analysis*; D010653:Phenylbutazone / Q000032:analysis*; D012545:Schiff Bases
chemical_list: D001547:Benzaldehydes; D012545:Schiff Bases; D000632:Aminopyrine; D004177:Dipyrone; D010653:Phenylbutazone; D010113:Oxyphenbutazone; C510241:p-dimethylaminobenzaldehyde