title: Mass spectrometry of 16,16'-O-permethylated 17-ketosteroids.
mesh_terms: D015068:17-Ketosteroids / Q000032:analysis; D000738:Androsterone / Q000031:analogs & derivatives / Q000032:analysis; D002849:Chromatography, Gas; D003687:Dehydroepiandrosterone / Q000032:analysis; D004355:Drug Stability; D005043:Etiocholanolone / Q000032:analysis; D005069:Evaluation Studies as Topic; D006914:Hydroxysteroids / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008722:Methods; D008745:Methylation; D013055:Spectrophotometry, Infrared
chemical_list: D015068:17-Ketosteroids; D006914:Hydroxysteroids; D003687:Dehydroepiandrosterone; D005043:Etiocholanolone; D000738:Androsterone