title: [Mass spectrometric study on 3,5-dioxo-pyrazolidines and their methylation products].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D013058:Mass Spectrometry; D008745:Methylation; D010113:Oxyphenbutazone / Q000032:analysis; D010653:Phenylbutazone / Q000032:analysis; D011720:Pyrazoles / Q000032:analysis*
chemical_list: D011720:Pyrazoles; D010653:Phenylbutazone; D010113:Oxyphenbutazone
vernacular_title: Massenspektrometrische Untersuchung von 3,5-Dioxo-pyrazolidinen und deren Methylierungsprodukten.