title: Aromatization of the A-ring of norethynodrel, a steroidal oral contraceptive, during trimethylsilylation.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D013058:Mass Spectrometry; D009640:Norethindrone; D009641:Norethynodrel; D012822:Silicon Dioxide; D013696:Temperature
chemical_list: D012822:Silicon Dioxide; D009641:Norethynodrel; D009640:Norethindrone