title: Synthesis and cyclization of 21-hydroxyethylthioprogesterone derivatives.
mesh_terms: D003500:Cyclization; D003525:Cyclosteroids / Q000138:chemical synthesis; D008623:Mercaptoethanol; D011374:Progesterone / Q000031:analogs & derivatives* / Q000138:chemical synthesis
chemical_list: C012363:21-hydroxyethylthioprogesterone; D003525:Cyclosteroids; D011374:Progesterone; D008623:Mercaptoethanol