Steroids of unnatural configuration. Synthesis and properties of Ring B modified 17alpha-20-ketopregnanes.
D007659:Ketones; D010084:Oxidation-Reduction; D011278:Pregnanes / Q000138:chemical synthesis*; D011284:Pregnenolone
D007659:Ketones; D011278:Pregnanes; D011284:Pregnenolone