title: 17,21-Dihydroxy-5beta-pregn-2-ene-1,11,20-trione, a new analogue of cortisone. Methods for distinguishing between delta 2-1-oxo- and delta 1-3-oxo-steroids.
mesh_terms: D003348:Cortisone; D006914:Hydroxysteroids / Q000032:analysis; D007664:Ketosteroids / Q000032:analysis*; D008722:Methods; D009905:Optical Rotatory Dispersion; D011283:Pregnenes / Q000032:analysis* / Q000138:chemical synthesis / Q000145:classification; D013056:Spectrophotometry, Ultraviolet; D013057:Spectrum Analysis; D013329:Structure-Activity Relationship
chemical_list: D006914:Hydroxysteroids; D007664:Ketosteroids; D011283:Pregnenes; D003348:Cortisone