title: Steroidal heterocycles. 15. 4,4-Dialkyl-delta 5-3-oxosteroids, 1,4'-spiro [cycloalkyl-delta 5-3-oxo-steroids] and derivatives.
mesh_terms: D000478:Alkylation; D000736:Androstenes; D003510:Cyclohexanes; D003517:Cyclopentanes; D007664:Ketosteroids / Q000138:chemical synthesis; D009570:Nitriles; D013141:Spiro Compounds / Q000138:chemical synthesis*; D013329:Structure-Activity Relationship
chemical_list: D000736:Androstenes; D003510:Cyclohexanes; D003517:Cyclopentanes; D007664:Ketosteroids; D009570:Nitriles; D013141:Spiro Compounds