title: The twin ion technique for detection of metabolites by gas chromatography-mass spectrometry: intermediates in estrogen biosynthesis.
mesh_terms: D015068:17-Ketosteroids / Q000096:biosynthesis / Q000378:metabolism*; D000728:Androgens / Q000378:metabolism*; D000735:Androstenedione / Q000378:metabolism; D000736:Androstenes / Q000096:biosynthesis; D002247:Carbon Isotopes; D002849:Chromatography, Gas; D002850:Chromatography, Gel; D002855:Chromatography, Thin Layer; D003903:Deuterium; D004958:Estradiol / Q000096:biosynthesis; D004967:Estrogens / Q000096:biosynthesis*; D004970:Estrone / Q000096:biosynthesis; D005260:Female; D006801:Humans; D006914:Hydroxysteroids / Q000096:biosynthesis; D007664:Ketosteroids / Q000096:biosynthesis; D013058:Mass Spectrometry; D008722:Methods; D008861:Microsomes / Q000378:metabolism; D010920:Placenta / Q000166:cytology / Q000378:metabolism*; D011247:Pregnancy; D013739:Testosterone / Q000378:metabolism*
chemical_list: D015068:17-Ketosteroids; D000728:Androgens; D000736:Androstenes; D002247:Carbon Isotopes; D004967:Estrogens; D006914:Hydroxysteroids; D007664:Ketosteroids; D004970:Estrone; D013739:Testosterone; D000735:Androstenedione; D004958:Estradiol; D003903:Deuterium